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CastelliPro Seamless 2 Arm Warmer


Item # CSTZ7J8

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  • Black, L/XL ($29.95)
  • Black, S/M ($29.95)
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Item # CSTZ7J8

Why We Like The Pro Seamless 2 Arm Warmer

When we can't decide on a long-sleeve jersey or not, we simply pull on the Pro Seamless 2 Arm Warmer and get moving. This arm warmer from Castelli lets us control our temperature easily and transition between layers in seconds. It features the ideal balance between warmth and lightness and provides enough warmth to keep us moving through chilly days. When the sun decides to poke out from behind the clouds, we can easily stow away our arm warmer in our jersey pocket and carry on.

  • Arm warmers that keep us riding through shoulder seasons
  • Midweight for warmth and easy to take on and off
  • Pro-level fabrics offer moisture-wicking capabilities
  • Easy enough to slip off and stow in our jersey pocket
  • Highly breathable for when we heat up

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.