The Low Down Light Runner is an ORIGINAL FIT low cut length sock that sits just above the collar without falling into the shoe. A balanced base layer with a lightweight profile, strategically-placed LIGHT cushioning zones, and the ‘custom-fit-feel’ of our patented ‘Y-Line’ knitting structures. Run, Walk, Train, Climb, Bike, All Day Patented Whole Foot Comfort Engineering 144N Knit with a fine gauge merino wool for temperature regulation and ultimate softness. Wicks moisture, dries fast, and resists odors. Patented Free Range Toe Box ensures room for your toes while contouring around them. Patented Deep Heel Pocket wraps the foot, holds in place, and prevents blisters. Strategic cushion zones in the heel, arch and toe. Narrow welt above the shoe keeps the sock from falling down.