Covert Threads Rock Infiltrator Military Boot Socks USA Made Infiltrator Antimicrobial Sock Rock is our Hi-Speed Sock for Rugged Terrain. Specifically for Long Hauls & Heavy Loads, holds its shape through high mileage days, and provides energizing support of muscles. High Loft resilient cushion in specific strike zones help eliminate bruising of foot bottom from rugged territory. Silver Lining™ fights bacteria all day, every day. Go covert. Content: 42% Combed Cotton, 19% Coolmax, 19% Acrylic, 2.5% Silver Lining™, 12.5% Nylon/Lycra, 5% Nylon Description- LEG: Top= Welt construction for non-binding fit. Body= Graduated Support in leg of Sock for all Day Energizing support of muscles. Looser at the top and snugger fit at ankle. Helps promote circulation up the leg from foot. Shin Guard=Build-in cushion Impact absorption shin guard FOOT: Instep= Vapor mesh allows the foot to breath and stay cool without compromising protection. Heel = “Y” heel construction provides the best contouring fit for the heel. Foot Bottom= Blister Protection- Hi Loft super soft Acrylic blended with Ingrain wicking Polypropylene. Moisture movement- Ingrain Polypropylene moves moisture away from foot bottom while soft acrylic helps keep feet dry. Antimicrobial Protection- Silver Lining™ battles bacteria helping eliminates foot odor throughout the entire garment. No Hot Spots-Silver Lining™ aids in storage and distribution of thermal energy efficiently and evenly. Radiates thermal energy very slowly. Transfers moisture quickly. Shock Protection-Hi Loft Acrylic and resilient polypropylene keeps cushion dense, standing and durable all day. ARCH: Arch support- Extra support band knit in the arch area aids in relieving foot stress/strain throughout the day. Made in USA Covert Threads Rock Infiltrator Military Boot Socks USA Made