High-tech seamless knitting technology brings us the Castelli Iride Seamless Short Sleeve Base Layer. This ultra-soft base layer stretches with your movement and wicks moisture with hydrophobic polypropylene fibers. A tallish collar keeps your neck warm and cozy.

• Polypropylene/Nylon/Lycra blend
• Seamless construction
• Tall collar
• Recommended for 50 - 65 degrees