Castelli Fast Feet 4 Sock Size:L/XL which uses a honeycomb design

which uses a honeycomb design that evaporates moisture quickly so it feels smooth and cool during high output or in rising temperatures

Combined with 1

The Boa® Li2 lacing system delivers fast

with medium size snow baskets for use in all conditions

*Note that inseam lengths may vary between pant styles and may vary from pant to pant slightly in the same style and size due to the stretch nature of Sporthill fabrics

Castelli Fast Feet 4 Sock Size:L/XL which uses a honeycomb designThe Castelli Fast Feet sock has the development and testing to back up the aerodynamic claims. Features: Castelli's Fast Feet project for maximum aerodynamics Foot portion based on Castelli Rosso Corsa Sock for in shoe comfort Polyurethane grip strip at top to keep sock in place Leg portion constructed with engineered grooved Lycra to help detach airflow