Jerseys/Tops (Short Sleeve)

Finding the perfect trail jersey is often a struggle but with our new Trail Jerseys, we believe we've hit the mark. The secret sauce comes from the new MiniR fabric that reflects the sun to help keep you cool yet is plenty tough for the rigors and abuse that comes with trail riding. Not stopping there, we employed a casual style so you'll feel right at home on the mountain and then grabbing some grub on the way home. - MiniR is a trademarked performance fabric, made from an exclusive yarn technology that reflects the sun’s rays to keep the wearer cool. It has a high UPF rating to provide longer sun protection for the skin. - Deflect UV 50+ protects you from the sun's harmful rays. - Crew neck collar keeps things casual and comfortable. - Women's Specific Regular Mountain Bike Fit is generous and comfortable. - Fabric Content: 80% Polyester, 14% Cotton, 6% Spandex

Details like drirelease moisture management, 3 expandable storage pockets, and reflective highlights near the back pocket make the Men's Ride Jersey the one to grab when you're looking for your best days on the bike.

Details like drirelease moisture management, 3 expandable storage pockets, and reflective highlights near the back pocket make the Women's Ride Jersey the one to grab when you're looking for your best days on the bike.

Make sure you're prepared to go the distance in your next tri. Giant's Race Day Sleeveless Tri Top is optimized to provide top-tier performance, whether you're just starting your swim, deep into your bike leg, or running towards the finish line. Its four-way stretch Stratos fabric moves with your body for a great fit and long-term comfort during all of the disciplines. Plus, its chlorine-resistant for race day simulations in the pool boasts a 20cm zipper for ventilation, and features two rear pockets for easy access to your fuel.

Our new super soft 2022 custom Trail Shirt available in Men's/Women's and Short/Long sleeves to rep Full Cycle, Colorado Multisport, and The Tune Up (Boulder's Cycling Hub!) on your off-road cycling adventures wherever you are in the world! Loose and relaxed fit, perfect for both gravel/MTB riding and casual hanging out. Extremely comfortable and stretchy, made of recycled polyester, cotton, and elastane. Select between Men's/Women's and Short/Long sleeves. Produced by Specialized.

Our new 2022 custom road kits (men's and women's) to rep Full Cycle, Colorado Multisport, and The Tune Up (Boulder's Cycling Hub!) on your road cycling adventures wherever you are in the world! Select between Men's/Women's and Jersey/Bibs. Produced by BASE Performance.

Represent your favorite bike shop in Boulder Colorado wherever the road takes you with our 2023 Custom Men's Jersey Castelli Competizione 2.

Represent your favorite bike shop in Boulder Colorado wherever the road takes you with our 2023 Custom Women's Jersey Castelli Competizione 2.

- Drirelease yarns wick moisture and dry four times faster than cotton - Full garment utilizes recycled fabrics - 85% Recycled Poly 15% Regular Cotton

With all the comfort of your favorite t-shirt paired with all the performance qualities of technical fabric, the Ranger TruDri Jersey lives to keep you cool on the trail. Constructed from TruDri fabrics designed to wick sweat away from your body as you ride, plus Jacquard detail for added ventilation, this best-value performance jersey looks great both on and off the bike. Tailored with a mountain bike fit, including a drop tail panel to offer coverage as you move around on your bike, it'll fast become your new favorite jersey for rides with your crew.

- TruDri fabrics move sweat away from the body to keep you dry and comfortable - Carvico racerback with laser cut perforations - Slit hem detail offers maximum mobility - Bonded front neck hem reduces chafing

- Drirelease yarns wick moisture and dry four times faster than cotton - Full garment utilizes recycled fabrics - 85% Recycled Poly 15% Regular Cotton

The A Blocco jersey is built on our Squadra base model, our all-around performer for everything from weekend club rides to training to long days in the saddle. The main prosecco micromesh fabric ensures lightness and quick drying; the perforated side panels enhance breathability; and the construction of the sleeves, with no seams at the ends, provides unrivaled comfort. The YKK zipper and the structure of the back pockets, which faithfully reproduce the characteristics of our Worldtour team's racing jerseys, complete the A Blocco. The result? a jersey that offers outstanding fit, rapid drying, and exceptional comfort. - Prosecco micromesh main body fabric to keep you dry - Mesh side panels for breathability - Velocity Rev2 fabric on sleeves with close-to-body fit and raw-cut endings - Covered YKK Vislon zipper - Drop tail with 3 rear pockets

The Right Race Jersey for Speed and Comfort Some triathletes choose long sleeves for the extra speed. Some for the comfort. Some for sun protection. This jersey gives you all three. The aerodynamic speed is unmatched. It's what Castelli does best. We have a year-round testing and development program with the Norwegian Technical University in Trondheim to make our race gear the slickest around. The comfort is what comes from our expert pattern engineers and soft performance Italian fabrics. We reduce the number of seams so that there is less chafing and less to bother you when you should be concentrating on pounding out the run. Sun protection...well, you've trained untold hours for this day. We focus on speed, but we still manage to block 94% of UV rays with our back Velocity mesh fabric that doesn't compromise speed, comfort or breathability. You may want to add some sunscreen, but this fabric provides UPF 16 protection, which is a significant help. Your cotton T-shirt is probably UPF 8. Take note of the well-thought-out details: Castelli's generous two pockets lie flat but hold a lot of gear and nutrition. The SnapLock fasteners clip to Castelli shorts to prevent the top from riding up during the swim or bike. - Freedom of movement in the water, aerodynamics on the bike, comfort on the run - Velocity Rev2 aero fabric on front-facing surfaces - UPF 16 Velocity mesh back blocks 94% of UV light with generous breathability - 2 rear pockets lie flat and prevent nutrition from bouncing around - GIRO3 flat gripper elastic lies flat on lower back - SnapLock fastener at lower back to clip to Free Tri Short to prevent riding up during swim or bike leg - YKK Camlock zipper - Elbow-length sleeves for maximum aerodynamics

A tri top has never been this comfortably fast Tri fashion (and the wind tunnel) have pushed toward short-sleeve tops, but we think there's still a place for the traditional sleeveless top. It's more comfortable on the run and cooler in hot weather. . . And maybe you're just a traditionalist. We've packed this top full of features: the front fabric comes straight from our Tour de France winning aero race jersey, and the back fabric offers maximum breathability. The top has two generous pockets for whatever you need to carry. It has snaplock fastners that clip on to Castelli shorts to prevent the top from riding up during the swim and to keep coverage of the lower back on the bike-then you unclip for added comfort during the run. The YKK zipper makes adjusting the ventilation easier than ever. Finally, we've taken extra care around the armhole to make it lie flat for speed yet remain soft to prevent chafing. - Freedom of movement in the water, aerodynamics on the bike, comfort on the run - Velocity rev2 aero fabric on front-facing surfaces - UPF 16 velocity mesh back blocks 94% of UV rays, with generous breathability - 2 rear pockets lie flat and prevent nutrition from bouncing around - Giro3 flat gripper elastic lies flat on lower back

Core riding performance in a jersey that delivers everything you need for any surface, with a neutral fit. - Italian lightweight yet durable fabric for a soft hand and great fit - Sublimated overprint tone-on-tone graphic - YKK® Vislon® zipper for easy open/close - Jacquard rear elastic for extra pocket support - Neutral fit for a more relaxed look and comfort on any bike on any surface

Cyclists of all levels, ages and body types are delighted when they discover this jersey. Designed to perform for all types of riding, Terry’s top selling Breakaway Mesh Sleeveless Jersey offers an amazing array of cycling features, offers UV and anti-microbial protection that’s woven into the fabric (won’t wash out like other fabric finishes) and gives you added ventilation with mesh side paneling. Relaxed fit (also available in plus sizing). - main body 100% polyester with UPF 40+ - side panels are 92% polyester/8% spandex -  moisture-wicking and antimicrobial - 10-inch front zipper - elastic-free arms and hemline - full collar, tapered at front - one-of-a-kind custom prints are unique to Terry - 2 open rear pockets - UPF 40+ sun protection - Relaxed fit.

This jersey is designed to suit any day on the mountain bike. Raglan sleeves and a stretch fabric give you all the freedom of motion you need. Lightweight performance fabric wicks moisture to keep you cool and dry all day long. - M80 Performance Fabric is lightweight and made in the USA from recycled plastic bottles - Fit is semi-tight for comfort without flapping - Raglan sleeves offer freedom of movement - Drop-back hem provides extra rear coverage when you’re in a riding position - "Men’s" cut - Made in Wisconsin

This jersey is designed to suit any day on the mountain bike. Raglan sleeves and a stretch fabric give you all the freedom of motion you need. Lightweight performance fabric wicks moisture to keep you cool and dry all day long. - M80 Performance Fabric is lightweight and made in the USA from recycled plastic bottles - Fit is semi-tight for comfort without flapping - Raglan sleeves offer freedom of movement - Drop-back hem provides extra rear coverage when you’re in a riding position - "Women’s" cut - Made in Wisconsin

The Monitor jersey is a performance mountain biking and gravel jersey that breathes well, wicks moisture, and holds up to abuse ride after ride. - Italian four-way stretch knit mesh - Maximizes airflow and sweat-wicking - Durable BreatheLITE fabric under the arms for abrasion resistance - Trim, on-bike fit doesn't flap in the wind - Rear drop covers back even in aggressive positions - Hidden terry-wipe allows for quick cleaning of sunglasses - Recommended for temperatures from 65°–100° F - Women's cut

The ADV Air Short Sleeve Jersey is made with VaporRize™, a unique blend of yarns that move moisture away from the skin to keep you dry and comfortable. With a UPF 50 rating, a front chest zipper pocket, and a cinchable hem, you’ll feel secure and protected while riding through all the wild elements. - Back panel zipper pocket keeps your essentials secure during your ride. - Bottom hem adjustability for secure fit. - Fabric Content: MAIN: 13% Cotton, 5% Spandex, 82% Polyester - OTHER: 94% Nylon, 6% Elastane

Ahh, the freedom of the open road, of the untrodden gravel path, of the bar stool at your local brewhouse post ride. Our ADV drirelease® Merino Wool jersey is as at home for a long day on backcountry gravel or fire road ascents, as it is just relaxing with friends swapping stories from the adventure. - drirelease® Merino with FreshGuard naturally cools, neutralizes odor, and wicks away moisture to keep you dry. - Unique Jersey fit with no front zipper, providing the perfect piece for transitioning off the Gravel into the café. - Two rear zipper pockets provide secure storage for small items. - Bottom hem elastic keeps the jersey fit close to the body, even when it's worn over your RBX Adventure Bibs with SWAT Pockets. - UPF 30+ rating protects your skin from harmful ultraviolet rays. - Regular Fit is generous, so it fits close to the body without being constricting. - Fabric Content: Knit 84% Polyester, 11% Wool, 5% Spandex

When you need comfort and performance at a tremendous value, look no further than our RBX Jersey. It's made from our VaporRize knit fabrics that place a focus on balancing durability and moisture management, which means that you get a jersey that'll be long-lasting and quite comfortable over the long haul. Adding to the comfort, you'll find that we included a full-length front zipper for on-the-fly venting, as well as our Regular Fit. This cut hits the sweet spot in-between race and classic, so it's perfect for long, all-out rides, yet it's roomy enough to avoid any pinching or the feeling of being constricted in your movements. There are also three rear expansion pockets to house all of your small ride essentials. - Fabric Content: MAIN: 86% Polyester, 14% Elastane; OTHER: 95% Polyester, 5% Spandex - Full-length front zipper gives you the power to manage ventilation under hard efforts or chilly descents. - Regular Fit is generous, so it fits close to the body without being constricting. - Soft knit fabric pairs with breathable mesh to tackle moisture management, while remaining soft against the skin and supportive in all the right places. - Three standard pockets provide ample space to securely house all of your ride essentials and electronics. - UPF 30+ rating protects your skin from harmful ultraviolet rays.

Nothing inspires the romantic sentiment of road cycling like Merino wool, but until now, it hasn't really been renowned for its performance benefits. And when we say "until now," we're really just talking about our RBX drirelease Merino Jersey. So what are the benefits? How about a natural ability to combat odor and microbial buildup, all while managing & evaporating moisture like nobody's business? Yes, Merino does all of this without the bat of an eyelash. Our drirelease Merino, however, combines the natural hydrophilic (water-loving) wool fibers with a blend of hydrophobic (water-hating) synthetic fibers to push away and evaporate sweat at an even faster rate. On top of this, the blend enhances the already soft feel of the wool, ensuring that this will be one of the most comfortable jerseys in your closet. Keeping with this theme of comfort, we gave the RBX a fit that teeters somewhere between race and classic, so it'll move with the body without a constrictive feel. And lastly, you'll find that it has all the features you need for daily riding, like three rear expansion pockets and a full-length front zipper. - Fabric Content: Knit 84% Polyester, 11% Wool, 5% Spandex - Full-length front zipper gives you the power to manage ventilation under hard efforts or chilly descents. - Regular Fit is generous, so it fits close to the body without being constricting. - Three standard pockets, and an additional zipper pocket, provide ample space to securely house all of your ride essentials and electronics. - UPF 30+ rating protects your skin from harmful ultraviolet rays. - drirelease Merino with FreshGuard naturally cools, neutralizes odor, and wicks away moisture to keep you dry.

When mother nature turns on the faucet, the SL Pro Rain Jersey is here to keep you warm and dry. They're fully wind- and water-resistant and pair perfectly with the Race Rain Arm Sleeves for full protection. - Fabric Content: MAIN: 100% Polyester; OTHER: 61% Nylon, 31% Polyester, 8% PU - Front zipper guard detail keeps water away from your full center front zipper closure and makes it easy to unzip with one hand, while riding. - Knit, waterproof membrane protects you from wind and water in all of the most important areas to keep you warm and dry. - Three back pockets and secure zipper pocket help to secure all your ride needs, right where you want them.

Using ultra-soft modal fabric that includes a fiber derived from beech tree pulp, our Trail Modal Short Sleeve Jersey ensures comfortable and durable wear, with natural breathability and moisture-wicking properties—making your search for the perfect mountain bike trail jersey an easy choice. Tailored for the trail, the jersey features a dropped tail for added coverage and subtle sleeve articulation to prevent fabric bunching. The relaxed mountain bike fit offers a loose and comfortable feel, making it suitable for all your trail adventures. Elevate your ride with the unbeatable combination of comfort and performance in our Trail Modal Short Sleeve Jersey. - Ultra soft modal fabric contains a fiber made from beech tree pulp for ultimate comfort and performance. - Modal fabric is naturally breathable, moisture wicking, and durable. - Dropped tail for better coverage on the bike. - Subtle sleeve articulation prevents fabric from bunching. - Relaxed mountain bike fit is loose and comfortable for the trail. - Fabric Content: 48% Modal: 47% Cotton: 5% Spandex

Finding the perfect trail jersey is often a struggle but with our Trail Jerseys, we believe we've hit the mark. The secret sauce comes from the MiniR® fabric that reflects the sun to help keep you cool yet is plenty tough for the rigors and abuse that comes with trail riding. Not stopping there, we employed a casual style so you'll feel right at home on the mountain and then grabbing some grub on the way home. - MiniR® is a trademarked performance fabric, made from an exclusive yarn technology that reflects the sun’s rays to keep the wearer cool. It has a high UPF rating to provide longer sun protection for the skin. - UV 50+ protects you from the sun's harmful rays. - Crew neck collar keeps things casual and comfortable. - Relaxed fit is unrestricting to easily accommodate chest and elbow pads. - Fabric Content: 80% Polyester, 14% Cotton, 6% Spandex

You wanted the best, and our SL Race Jersey delivers. It represents everything we know about jersey design, and it checks all the boxes for how a premium jersey should perform. This is the SL Race. From start to finish, we spared no expense and thought of every detail down to the very last stitch. For the construction, we used our venerable VaporRize knit fabrics that provide the optimal blend of moisture management and breathability. We paired this with a compressive performance stretch-knit to give you a fit that's the same as our Evade Skin Suit. Not only this, but the materials we used are incredibly soft against the skin for all-day comfort on the road. And compared to the rest of the SL line, this jersey has some unique features, like our structured back panel and welded "cuffless" sleeve design that improves your aerodynamic profile and overall compressive comfort. Of course, you'll also find convenient features like three rear pockets, a zippered sweatproof pocket for housing your electronics, and a full-length front zipper. But you'll also get our Slim Fit that makes the SL Race jersey feel painted on, so it follows all of your movements in the saddle without leaving any material bunched or flapping in the wind. - Born in our Win Tunnel, the top-of-body patterning is derived from the S-Works Evade GC Skinsuit to give you best-in-class fit and aerodynamic benefit. - Fabric Content: BODY: 85% Polyester, 15% Elastane, BACK: 75% Polyester, 25% Elastane - Full-length front zipper gives you the power to manage ventilation under hard efforts or chilly descents. - Slim Fit provides a precise, second skin level of fit that's ideal for hard days out, aggressive training, or top-level racing. - Tall sizing offered with additional body length. - Three standard pockets, and an additional zipper pocket, provide ample space to securely house all of your ride essentials and electronics. - UPF 30+ rating protects your skin from harmful ultraviolet rays. - VaporRize lightweight, soft mesh fabric pairs with stretch-woven back panel to tackle moisture management, while providing next to skin compressive comfort.