These water bottle sling bags are common accessories for helping you carry the water bottle easier. Furthermore, it not only can provide a good protection for your water bottle from scratching, but also keep your water bottle warm or cold. Suitable for many situations: biking, travel walking, camping, and some sports events.SpecificationColor: Black, Green, Blue, GrayMaterial: NeopreneOverall Size: 65mmx180mm / 2.56"x7.09"Suggested for Bottle Size: 65 to 70mm Diameter（Approx 500ml)Thickness: 3mm / 0.12 inchPacking List: 4 x Water Bottle SleeveAdvantages1. Neoprene is not just soft and comfortable to touch, it is also durable to and easy to clean.2. Finger strap design, you can hold the water bottle with finger or a hook, much convenient.InstructionEasy to use, put your water bottle in the water bottle sleeve. And it is also easy to take it off.NOTE: Please note to choose the right size according to your water bottle's diameter.