Extra thick and reinforced T3. Warm and dry feet in the most extreme conditions. Ideal for routes with a rigid or semi-rigid boot. 
 
Sock Height 
Crew
 
Sock Content 
51% PrimaLoft®, 29% Nylon, 10% MerinoWool, 10% Ea. LYCRA®
 
Reinforcement
Whole Sock
 
Cushion 
Heavy Full