100% natural and breathable Glerups fine wool makes feet feel dry and warm. All-season comfort. No-itch wool. No-slip leather. No-substitute Glerups. Packable, giftable, loveable.Natural comfort since 1993.Natural wool with a sole of semi-vegetable tanned calfskin avoiding unnecessary chemicals and using only colours that are free of heavy metals and toxic dyes. 100% pure wool and 100% no itch. Now that's natural comfort!