Adjustable Size: Water Bottle Pouch with drawstring on the top, mesh bag on the side, suitable for bottle sport, beverage bottles, as well as phones, umbrellas, or toolsPremium and ReliableWater Bottle Holder is made of water resistant Polyester fabric, and built in insulation, is sturdy and wear resistant, and is great for outdoor activitiesBackpack and Bike Attachment: Water Container Pouch with sticky and buckle, Drawstring strap to fix, mesh pocket on the side, easy to attach to a backpack, bike handlebar, seat post, vest, waist belt, or other gears as an extra exterior pouchGood Functional: The water bottle carrier with carrot designed, protecting your belongings from scratching, and falling off, and easy to take care of while cyclingWidely Used: Water Bottle Carrier is suitable for outdoor sports, cycling, running, hiking, camping, backpacking, climbing, fishing, hunting, and other activitiesSpecification:Material: PolyesterSize Chart:10cmx17cm or 3.94inchx6.69inchPackage Includes:1 Bicycle Water Bottle Holder BagNote:Please allow slightly errors 1-2cm or 0.39-0.79inch differences due to manual measurement.