RUPUMPACK CUSTOMER SERVICE: This hydration pack is not only suitable for running, you can also use it for hiking, cycling, etc., and is suitable for men, women and kids. If you have any dissatisfaction with the product within 365 days, please contact us. We will solve your problem within 24 hours. Grab our running hydration vest and feel the freedom of trail running!. INTIMATE AND COMFORTABLE: Soft shoulder strap edges prevent the pack from chafing your skin. Adjustable chest/shoulder straps give the pack a perfect fit without bouncing. Mesh material on the back and shoulder straps maximizes breathability. These thoughtful designs allow you to run comfortably and freely. EFFICIENT STORAGE: 2 stretch mesh pockets on the chest hold water bottles, food, or glasses. The insulated compartment can store hydration bags, and the main compartment can store sunscreen, jackets and more. To travel light, efficient access, let you run faster and farther. CONVENIENT HYDRATION SYSTEM: Comes with a 2L water bag, enough for 2 hours of drinking water, no need to stop to replenish; large 3.5-inch diameter opening for easy filling and cleaning. With an insulating compartment made of aluminum foil, it keeps liquids cool for up to 4 hours, allowing you to drink cool water even when outdoors. This hydration backpack allows you to enjoy the beauty of nature with all your heart and soul without worrying about hydration when outdoors. RUPUMPACK Leg Gaiters Waterproof Adjustable Snow Boot Gators for Hiking Hunting Climbing Skiing Snowshoeing Men Women. nylon.