TETON Sports Oasis 1100 Hydration Pack; Free 2-Liter Hydration Bladder; For Backpacking, Hiking, Running, Cycling, and Climbing SATISFY YOUR THIRST FOR ADVENTURE: Lightweight and comfortable; This hydration pack is a terrific companion for all your day-long or overnight hydration needs; Size 1100 Cubic Inches (18 L) FREE HYDRATION BLADDER: BPA free, 2-liter hydration bladder; Durable, kink-free sip tube and innovative push-lock cushioned bite valve; Large 2-inch (5cm) 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 customer service 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