T3 Pro Trek Heavyweight Crew Unisex Sock fur and detail of the exterior

and detail of the exterior shape deliver bold design and high functionality to the all-new MOD3

features a front bungee system

Clean water all day—without the weight

Toe-asis™ Foot Warmer Pocket: Baffled pocket of insulation rapidly warms cold feet

Based on a legacy of iconic X Ultra shoes

T3 Pro Trek Heavyweight Crew Unisex Sock fur and detail of the exteriorCrew length sock, thick and completely padded, including the instep. Constructed with recycled PRIMALOFT and RWS merino wool, it is designed for activities carried out in cold temperatures. With a Comfort Plus cuff that provides greater comfort and prevents excessive tightening of the calf. 50% Primaloft Recycled 19% Stretch Nylon with Lycra 15% Merino Wool 16% Red Cycled nylon Polyester yarn developed by Primaloft (world number one in artificial