Only backpack, the water bladder is not included!
Bag size ( L x H ): 28 x 43cm / 11.02 x 16.93 inches，
Only 6.7oz Running Hydration Pack Super Light.
Chest circumference: 65-135cm, 25.59''-53.15''
Applicable: unisex

This product is compatible with 1.5L water bladder (Optional)

Breathable Running Hydration Vest Men's Women's.

Our hydration backpack weights 0.51 pounds and is super light, reducing much of the load during the trip.When it comes to hiking, the shorter you plan to spend on the trail, the lighter pack you'll need.
Designed with 9 exterior pockets, you can store all tiny items such as vacuum cup, keys, phone and cash etc. These pockets also allow you to get the things directly, extremely convenient
Suit For: Trail Running, Road Running, Night Running, Cycling, Hiking, Climbing
Smooth and anti-rust race vest zipper.
Toughness and durable fastener.