Men's Summit Sleeveless Base Layer Size:XS An internal waist-cinch allows for

An internal waist-cinch allows for fine adjustments to fit

interior zipper draft-flap

A rear-drop keeps your back covered while you ride in an aggressive position

and an elastic hem and armhole for a comfortable fit

3-panel design fits easily under a helmet

Men's Summit Sleeveless Base Layer Size:XS An internal waist-cinch allows forThis ultra lightweight, super stretchy base layer has been designed to provide a performance form fit and optimal moisture transfer and heat regulation during warm weather rides. The honeycomb structure of the knit not only wicks perspiration away from the skin but it also facilitates air movement between the jersey and base layer which speeds evaporation and cooling. Only 55 grams in a size medium. What sets this base layer apart from all the others