Cold floors warm instantly when your bare feet are in glerups Slip-on. The secret is the wonder of no-itch wool, the breathable fibre, that retains the perfect body temperature while wicking away moisture. Felted from ethically sourced 100% natural no-itch wool, glerups Slip-on in Grey is Danish comfort—without bending or reaching. Fun colours borrowed from nature. Waterproof natural rubber soles for around the house, RV, balcony, and campsite. Our passion is felt!