Alwero Basic House Slide-in Warm Slippers wool Merino Wool Rubber sole Superb Quality Merino Wool Insulating thanks to wool's effectiveness in absorbing and releasing water vapour in the air - different from the blocking quality of synthetic fabrics. Breathable thanks to wool's reaction to body temperature, making them odour-resistant. Relaxed style with wool's natural tendency to adjust to feet's width for your comfort.