Crisp mornings, warm afternoons.
On days when you know you need something extra under your jersey, but you don't really want to feel an extra layer, grab Castelli's Pro Issue Sleeveless Base Layer. Constructed out of lightweight polyester 3D mesh, the top fits under a jersey and facilitates moisture transfer from your skin to your jersey to keep your temperature regulated on crisp fall days or cool spring mornings. The 3D mesh forms a thin insulating layer next to your skin to keep you warm, and as you heat up, the material will continue to wick away sweat to cool you off. On this year's version, Castelli widened the collar to fit better under aero jerseys and included a flat waist hem along the bottom to prevent chafing or irritation when tucking it into shorts.
View more Men's Sleeveless Base Layers
- How to Measure:
- For best results, take measurements over your underwear.
- Measure under your arms, around the fullest part of your chest.
- Measure around your natural waistline, keeping the tape a bit loose.
- Measure around the fullest part of your body at the top of your legs.
- Using pants that fit well, measure the crotch seam to the bottom of the leg.
Reviews & Community
Great warm-weather choice
- Fit: True to size
- Size Bought: M
Very similar to my Rapha Pro Team base layers, possibly a bit lighter and softer in texture. Very comfortable, no scratching or chafing from the seams. Love the closed-mesh design. I sized up to a L following the usual patterns with Castelli kit, could have done a M instead.
just exactly right. w/ or w/o sleeves
I have lots of base layers. And if you don't, you should start with this one. Or get the Short sleeve
Excellent spring & summer vest baselayer
- Familiarity: I've put it through the wringer
Great summer vest baselayer that Castelli "officially" rates for use from 60° to 77°+ F.
Very, very light material. Open cell weave: well ventilated material. I really love using this piece when climbing in 60°-80° weather. During steep ascents, I unzip my jersey all the way and this ultralight vest baselayer wicks away sweat and helps keep my chest cool but not totally bare.
In weather above 80° (and esp > 90°), personally, I would use Castelli's more open fish-net vest ("core3") baselayer.
Sizing: Usually size up +1 with Castelli. Here also. I'm 5'10" and 185. The XL here fit perfect. Wrap around as designed. The size XL could easily fit a rider 180-200 lbs.