WATERFLY Running Waist Pack with Water Bottle Holder, Waist Belt Fanny Pack Phone Holder for Men Women Breathable Material: With durable nylon and breathable mesh fabric, it is anti-friction and wear resistant, breathable for sweat dispersal and air circulation, ideal for outdoor sports Water Resistant: The outside material is water resistant, effectively prevents your belongings against raindrops, sweat and moist Stable Water Bottle Holder: Elastic strap on the water bottle holder mouth keeps your bottle stable and safe without shaking while running or jogging Adjustable Waist Belt: The soft nylon waist belt can be adjusted to fits closely around your waist, and the buckle closure makes it easy take on and off Reflective Strip & LOGO: Reflective strips on the storage bag and reflective logo on water bottle holder can effectively make you seen in the dark, it is a nice secure design for night running