100% Pure Cotton Canvas Upper Lightweight and breathable to keep feet dry and comfortable in hot weather; sustainable and friendly to the environment. Bionics Foot-shaped Design Perfectly fits the shape of any foot, granting ultimate freedom and relaxation to your walking experience. Loose toe-box is great for bare-foot use, allowing your toes to splay into their natural posture Dance in the Air Ultra-lightweight Lightweight, one-piece design weighs roughly the same as an avocado (130g/shoe).