Adjustable Elastic Strap: The elastic band of this running belt is flexible and adjustable, it can easily adjust to height from 60-120cm, fits most people's height, it won't put you down uncomfortable or burden your body. Waterproof: The outer side of the running belt is made of high quality nylon and lycra and the inner side is made of TPU. Soft and comfortable, ultra thin and breathable. It's also waterproof, keeping your items away from sweat or rain. Reflective strips: This running belt has reflective strips on the front and back to keep you safe and visible when you move in the dark Multi-functional pockets: The waist pack for running has three pockets, ensuring enough space for your phone (easily fits smartphones up to 6.7 inches), wallet, keys, cards and other essentials. And the zipper only slides when open or closed, keeping items secure. The mesh pockets on the side of this running belt easily convert into a bottle holder. Multi-purpose: The sweat-wicking waist bag is suitable for running, cycling, outings, climbing, to exercise, hiking, camping, outdoor sports, jogging, travel and other activities.