You can drink water without having to take the bottle out of your backpack. Features: Easily converts most bottles with a threaded opening into a handy hydration reservoir. Made from food grade TPU, PE, and silicone materials, safe, BPA free, and durable. Fits most water bottles with 28mm or 30mm threads. Transparent hose is adjustable to suit your needs. Total length: 40cm / 15.7in. Includes a handy clip to attach the hose securely to your backpack or other gear. Soft bite valve with dust cover ensures clean drinking water. Connected strip between dust cover and bite valve prevents loss of the cover. Air valve included to help prevent leaks. V-shaped hose design enables fast water flow. Ideal for trekking, fishing, climbing, hiking, rafting, canoeing, boating, backpacking, kayaking, cycling, and other outdoor activities. Specifications: Material: Food grade TPU + Silicone + PE Blue Hose Length: 80 cm / 31.5 in Transparent Hose Length: 40 cm / 15.7 in Package Size: 18 x 14 x 4 cm / 7.1 x 5.5 x 1.6 in Package Weight: approx. 128 g / 4.5 oz Package List: 1 x Water Bottle Hose