The quick-drying polyester and spandex upper and the rubber sole with drainage hole offer good ventilation and make water shoes dries quickly for comfort. The barefoot shoes are form fitting on the foot but not constraining. The stretchy material encloses the foot well and without being tight. The shoelace can help adjust the tightness of the water shoe. Outer Material: The upper of water shoes is made of breathable and quick-drying polyester and spandex materials. This fabric is soft and elastic, flexibly adapts to the shape of the foot. Inner Material: A removable and breathable insole inside the water shoe ensures comfort. Sole: The rubber sole of the water shoe features non-slip textures of different shapes, which offer good grip on wet surfaces. It is flexible but sturdy to protect your feet from sharp rocks and shells, hot beach, and more. Closure: Slip-On. Elastic shoe collar fits the ankle, easy to put on and take off. The elastic laces can be easily adjusted for a snug fit on the foot. Heel Type: The rubber sole features a reinforced toe area, which can protect against injury from sharp objects. The sole is oversized and wraps the edges a bit for more protection. Shoe Width: Medium The soles of water shoes are made of rubber and offer a good grip even on wet surfaces. They are additionally reinforced in the toe area, making them suitable for a variety of terrains. The water shoes are designed in slip-on style, the shoe collar is elastic, which makes it easy to put on and take off. Water shoes are lightweight, flexible and thin, easy to fold and store.