Teton Oasis 18 Liter Hydration Backpack - Here’s what we’ve heard: It’s the perfect size, you can quickly bungee a helmet or coat to the back, and it carries enough water for a full day of adventure. Teton has taken its original (and extremely popular) hydration pack and made it even better. With two sizes, you can find the ideal pack to meet the demands of your next adventures, whether that’s a day hike, festival, or really long walk. Built with Teton innovation, this outdoor favorite is made with durable ripstop construction for lasting function. No more being forced to reach across to your other shoulder because the Oasis features hydration ports on both the left and right sides. The front-zip pockets offer easy access for grab-and-go while you’re out-and-about. You can go all day with this Teton hydration pack thanks to its 2L bladder. Take comfort in Teton’s lifetime warranty.