Base Layer Basics. The Easy Fit Full Cushion Crew is a bit softer and not quite as snug as our original fit. Ideal for folks with wider feet, in-between sizes, or who looking for a little more volume due to sensitivity. Warmer and a bit thicker, it's a base layer with strategically-placed FULL cushioning zones, and the ‘custom-fit-feel’ of our patented ‘Y-Line’ knitting structures. The ideal choice to balance warmth, cushion, and a slimmer profile. Hike, 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. Patented Upright Compression tapers to the leg's natural shape, stimulates blood flow, and keeps the sock from falling down. Strategic cushion zones in the heel, toe and arch.