Non-Binding Welt Top: Non-binding welt top keeps sock up without being too tight around the leg. Exceptional Cross Stretch: Exceptional cross stretch hugs the body without impairing circulation and comfortably wraps you in luxurious point6 merino wool. Ankle Brace: Ankle brace keeps sock snug around ankle area and prevents sagging. Ventilation Panels: Ventilation panels facilitate breathability and streamline fit. Deep Heel Pocket: Deep heel pocket creates anatomical fit around heel, prevents slippage and movement around the heel. Reinforcement: Reinforcement in wear areas for abrasion resistance and greater durability. Arch Support: Arch support keeps sock snug across instep. Ultra Smooth Toe Seam: Has no lumps or extra fabric to irritate the toes. Tapered toe box anatomically hugs the foot.