EVERFUN Hydration Backpack 18L with Water Bladder 2L/3L Hiking Water Backpack Women Men Lightweight Insulation Hydration Day Rucksack for Hiking, Cycling, Running, Festival, Camping

UTMOST STORAGE CAPACITY: Backpack size 18.5" x 10.5" x 6", large opening 18-LITER main compartment to fit clothes/notebook/first-aid kit/pets' stuff.

Built-in mesh pocket for personal valuables.

Exterior upper velvet pocket perfect for protecting cameras, mobile phones.

Trekking poles, extra water bottle in the side mesh pockets for easy access.

Helmet carry between the outer pocket and middle pocket.

Don't worry, the EVERFUN Hydration backpack has the utmost storage capacity for you.

HIKING/CYCLING/RUNNING/SKIING WITH EASE -- With Ultra-Elastic 3D breathable padded back & adjustable chest, waist straps, this 2 pounds lightweight hydration backpack is comfortable and stable, perfect fits all sizes.

DRINK WITHOUT USING HANDS -- This 18L Hydration Backpack comes with a 2-LITER water bladder & bilateral hose outlets designed to keep your hands unrestricted.

It also features a separate insulated bladder compartment for up to 6 hours of cooling (with ice packs).

The 2-LITER bladder is replaceable and supports up to 3-LITER.