Hydration Bladder 2L-3L Water Storage Bag Reservoir,Military Hydration Pack Capacity?2Liter (70oz),Hydration Bladder 14" x 7", tube (0.4" diameter, 36" long),Clean Flexible Brush 39"perfect size is compatible with most hydration packs,Blue Hydration Bladder x 1 and White Hydration Bladder x 1 and Clean Flexible Brush x 1 Large-Diameter opening design:With the big opening design and holder, you can fill this bladder with water and ice cubes ,and easy cleaning and quick drying.Comes with a high quality neoprene tube cover to resist temperature changes. BPA- Free material:Made of sound BPA free military class EVA material,no "Plastic" smell or taste and is proven to bear strict test.With double soldering sealing, no crack and no torn. Auto-lock mouth:Hydration pack bladder with ON/OFF valve.Auto-shutoff valve prevents leaking when the tube is detached. Leakproof and Stability:the 2L bladder still stay filled without leak,can withstand temperatures from -20 to 50 degrees Celsius. and resists temperature changes in hot and cold weathers. hydration bladder is compatible with most hydration packs. The tube provides a wholesome flow for easy drinking, keeping you hydrated when hiking biking climbing cycling running camping