orthotic comfort aerothotic slip on sandals and flip flops with arch support for comfortable walk (us women 11, slit wine) aerothotic particulars: our super comfy slip - on sandals for women is a must have for any wardrobe. polyurethane injected gel enhances the comfort level of our sandals demonstrating shield against foot pain, knee pain, back pain, plantar fasciitis and other foot related issues. an agreeable expansion to your casual or semi – casual look. kneaded thread finishing on the upper surface compiled with synthetic leather. polyurethane gel mixed cushioned insole secured with man - made leather.