Men's Summit Sleeveless Base Layer Size:XS and an elastic hem and

and an elastic hem and armhole for a comfortable fit

the vest strikes a perfect balance between warmth and breathability

which helps maintain a regulated body temperature on long rides

3-panel design fits easily under a helmet

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

Men's Summit Sleeveless Base Layer Size:XS and an elastic hem andThis 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