slip-on closure 92% polyester+8% spandex Upper. Rubber sole. COMFORTABLE FIT — Ultra Light Weight Stretchy Material allows user to easily put on and take off, to provide you with a comfortable feeling. RUBBER OUTSOLE & FOOT SAFETY — Wearable and top-quality rubber sole, which protects your feet from being hurt by sharp objects. IDEAL FOR ANY ACTIVITY: Perfect for yoga training, beach, swimming, pool, weight training, wake-boarding, sailing, boating, kayaking, windsurfing, cycling, jogging, walking, fishing, beach volleyball, gardening, lawn, car-washing and driving. Family outings! VARIOUS SIZE AVAILABLE: From XS to XXXL fit different feet, little kids, teens, mens, womens are available. ( For the length, Please Refer to Product Description).