Hydration Backpack,Insulated Hydration Pack Lightweight Water Backpack with 2L Bladder for Running,Cycling,Camping,Hiking

COMPACT& LIGHTWEIGHT : Hydration pack is designed specifically for road cycling /running/ Hiking ,So this hydration backpack is feather-light, streamlined and stable on your back and won’t create a ton of wind resistance., This cycling hydration backpack has an insulation compartment made of thick aluminum foil, which can hold a 2L water bladder and can be liquid cooling for up to 4 hours. The best hydration pack for running, hiking, cycling, or biking, Fully adjustable shoulder/chest straps make sure it doesn't bounce when you move will fit chest sizes from teenagers/kids with 27" up to adults (men and women) with 50" chest size., Hydration backpack has a bike helmet organizer pocket, built-in safety whistle, extra storage pockets, and reflective accents for visibility in low-light environments. a Breathable mesh back panel for a cool & comfortable ride, 70ounces(2L)BPA-free and odorless water bladder, high-flow comfortable mouthpiece, double leak-proof design is safer, and large opening is convenient for water filling and cleaning. It is a professional water bladder for hiking backpacks.