Stay hydrated wherever the trail takes you with this ultra-convenient hydration backpack! Measuring 17.5" x 6.7" x 1.6", this BPA-free EVA pack features a polyester interior and a waterproof nylon exterior. It includes a 3.5L detachable liner and thick insulation that keeps drinks cold for up to 4 hours. Designed for convenience, it comes with a kink-free sip tube, cushioned bite valve, and a no-odor, leak-proof build. A separate internal pocket holds essentials like snacks or a phone, and the bladder and hose are fully removable for easy cleaning, so there’s no need to open the main compartments to refill.