- Size: 40 • Upper made of soft synthetic leather, wear-resistant and with a textile inner lining for greater comfort. • Non-slip sole with double layer of EVA and rubber, featuring a strip and concave circle design for increased friction. • Easy slip-on design for easy on and off, with grooves for a perfect fit to the foot. • Ergonomic insoles that provide support and comfort, reducing strain while walking. • Ideal for indoor and outdoor use: bedrooms, bathrooms, changing rooms, living rooms, spas, pools, beaches, and more.