FKT Crew Length Running Sock Apex 4 Altra makes a new foam

Altra makes a new foam formulation that results in a softer plushy EGO Max foam

Protection: interchangeable and removable bridge blocker and Unobtainium side shields designed to block glare and keep faces protected

Perforated polyester to the rear keeps you cool

With solid Missiongrip rubber on the outsole and Helion superfoam for traction

Patented footbed design reduces stress on knees

FKT Crew Length Running Sock Apex 4 Altra makes a new foamThe FKT Run Crew Sock is engineered for runners who demand extra protection and ankle coverage on the move. Combining targeted technical support with high performance moisture management, this crew length sock ensures your feet stay dry, comfortable, and blister free, whether you're chasing an "Fastest Known Time" or logging daily road miles. Features CoolMax EcoMade Tech: This sustainable polyester blend provides elite breathability and moisture