Mobihome Lightweight Insulated Hydration Backpack with a Bulit-in 2L BPA Free Water Bladder "The Mobihome hydration backpack comes with a built-in 2L BPA free bladder which is designed with a kink-free sip tube and innovative push-lock cushioned bite valve with a large 2-inch (5cm) opening. It features fully adjustable shoulder, waist straps and a padded mesh back that will fit for anyone; Intelligent storage of two layers design avoids being bulky, external bungee straps for additional carrying -eg. helmet or Jacket; Reflective trim, strap clipsand whistle for your day and night safety; Get outdoors, enjoy our beauty nature ! After-Sales Protection: We know you will have a wonderful shopping experience, However, if at any time you are unsatisfied, please kindly give us feedback, we will provide a refund within the first 30 days and replace defective items for life. ." Mobihome Lightweight Hydration Backpack "Durable and water resistance fabric; Seperate back pocket for 70-Ounce (2 Liter) bladder; Lightweight and wear comfortably for hours; Adjustable chest and waist straps fits for anyone; Reflective trim for night safety, strap clips to keep extra secure; Safety whistle for emergency situations; External bungee straps for additional carrying; Small front zipper pocket for snack;" Mobihome is one of the top leading manufacture that has been specialized in producing outdoor gears for over 30 years. We strive to manufacture the best products for outdoors enthusiasts. Our mission is to let every explorer appreciate the beauty of our nature comfortablely. Hydration Bladder Included Comfort Design Structure Deep Front Pocket & Bungee Straps Safety Features Backpack is perfect for men, women, and youth; Ideal for hiking, running, cycling, trail walking, climbing or any adventure outdoors; Let's get outdoor and enjoy the beauty of our nature;