The bottle holder contains an adjustable elastic rope, which can keep your bottle stable and safe while running or jogging, prevent bouncing and falling out. Fits great for waist from 19.7-44.9 inches, fully adjustable strap. Elastic waistband - The tension is moderate and fits the body better. With 2 main separate zipper pockets to keep your Phone X/XR/XS MAX/6/6s, keys, wallet etc. And another convienient back pocket insertion, perfect for carrying your cards, cash etc. Security and theft-proof, let you feel more at ease in sports.