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CastelliPro Seamless 2 Arm Warmer


Item # CSTZ7J8

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Item # CSTZ7J8

Pro Seamless 2 Arm Warmer

For those shoulder season temperatures, when committing to a full long sleeve feels a bit like overkill, Castelli's Pro Seamless Arm Warmers let you more easily control your temperature as you heat up throughout the ride or race. Through years of development with Castelli's Pro teams, they crafted these warmers with a blend of polyester, nylon, and Lycra fibers for the perfect balance of warmth without weight or bulk. They provide enough warmth to keep your mind of the chilly temperatures, while the breathability of the fabric keeps you from overheating. When things heat up, the warmers are lightweight and packable to fit comfortably in a jersey pocket for the rest of the ride.

Tech Specs
Material78% polyester, 15% nylon, 7% Lycra
Activityroad cycling
Manufacturer Warranty1 year


Arm & Knee Warmers





Rider Weight

99.2 - 132.3lb

(45 - 60kg)

99.2 - 132.3lb

(45 - 60kg)

132.3 - 154.3lb

(60 - 70kg)

154.3 - 176.4lb

(70 - 80kg)



Short/Jersey Size XS - S S - M S - M L - XL 2XL - 3XL
Short/Jersey Size:
Take your typical cycling short or bib sizing for comparison.

What do you think about this product?


>Rating: 5

Fantastic, but size up.

I've used it once or twice and have initial impressions
Runs small
Size Bought
155 lbs

Great warmers. Probably my favorite ones over 20+ years on the bike. I'm 6' and 155# and wasn't sure about the sizing - S/M seemed like it might be too small but L/XL definitely seemed like it'd be too big. I ordered both knowing I can just send one back and the L/XL fit great. Length was perfect and the fit was tight. I don't have toothpick arms but they're not exactly big, either. Sizing might be a problem for guys/gals with bigger arms.