SATISFY YOUR THIRST FOR ADVENTURE: Lightweight and comfortable; This hydration pack is a terrific companion for all your day-long or overnight hydration needs FREE HYDRATION BLADDER: 2-Liter; Durable, kink-free sip tube and push-lock cushioned bite valve; Large 2-inch (5 cm) opening for ice and easy cleaning CUSTOMIZABLE COMFORT: Backpack for men, women, and youth; Adjusts to fit all frames comfortably; Notched foam stabilizer and mesh covering means you can wear this pack for hours TRUSTED QUALITY: Over 1,000 verified 5-star reviews testifying to the quality and design; Large main pocket protects gear, clothes, and lunch; Bungee cord system for cycling and climbing helmets TETON SPORTS PROMISE: Reach out to our AMAZING product support team if you have any questions or concerns; YOU CAN COUNT ON US to get you taken care of and back OUTDOORS with TETON Sports Lightly used but in excellent condition. One minor flaw -- see last picture (small, dark line above the first "T" in Teton). Orders ship promptly after confirmation. Smoke-free, pet-free home. Will consider reasonable offers.