The Ultra Light Runner No Show stays below the collar without falling into the shoe. Our thinnest profile is lightweight, prevents blisters, and features the &';custom-fit-feel&'; of our patented knitting structures. Race day ready. Run, Walk, Bike, Train, Move Engineered for Whole Foot Comfort Knit with a fine gauge merino wool for temperature regulation and ultimate softness. Wicks moisture, dries fast, and resists odors. Free Range Toe Box ensures room for your toes while contouring around them. Deep Heel Pocket wraps the foot, holds in place, and prevents blisters. Narrow welt below the shoe collar keeps the sock from falling down Material Our materials are crafted to optimize odor resistance, durability, breathability, stretch, and moisture-wicking. Merino Wool 66%, Nylon 27%, Polyester 5%, Lycra 2%