LifeSocks Airborne Lite Invisible, Merino Socks with Seacell Active Shaped to fit the foot with a snug heel pocket and strategic cushioning, this versatile, lightweight sock has been designed for superior comfort and protection. Perfect for sports and outdoor activities, the Lifesocks Airborne Lite Invisible is the ultimate all-year-round sock High-stretch cuff and trademarked Elastic Support System (ESS) ensures low compression promoting circulation and a sock that won't bunch or ride down Soft merino wool knitted to the inside for superior softness and comfort. Superior insulation properties of merino wool keep the foot warm in winter and at an even comfortable temperature in warmer climates. Merino keeps feet drier by drawing and holding moisture away from the foot Seacell Active, a bioactive innovative cellulose seaweed and silver-based fiber, keeps feet supple and promotes optimal health Strategically placed cushioning throughout provides superior comfort and protection, while alignment points promote correct foot positioning during times of active movement