Impact-absorbing OOfoam technology in OOFOS' advanced OOmy footbed geometry; 360-degree seamless knit upper developed to reduce pressure for a secure, sock-like fit, feel and flexibility; Pull tabs and engineered knit collar allow for ease of entry and effortless wearability; Zen bands across the heel and instep hug your foot for a secure fit; Rounded, cupped heel designed to enhance impact-absorption and stability with every step; Lightweight, flexible and packable for ultimate travel ability; Reduces stress on sore feet, knees, and back; Minimalist construction for light weight; Enables more natural motion; Machine washable, plus moisture and bacteria resistant