Base Layer Basics. Formerly known as the Light Runner Low Sock. The FITS Electrics Light Cushion Low Sock is based on our most popular ORIGINAL FIT style.This low cut length sock 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, 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 above the shoe keeps the sock from falling down.