DriRelease Wool – super soft and high wicking for comfort, anti-microbial to reduce odour NanoGlide – in heel and toe– allows the fibres to glide across each other and not your skin, giving soft and friction free comfort to prevents blisters Mid-level anatomical cushioning in key pressure zones for optimum comfort, protecting your joints and tendons on those long runs Flat under toe seam construction to eliminate uncomfortable irritation Vented upper and arch grips to provide a great ergonomic fit without the sock bunching under foot or sliding off the heel