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Feature

WATER SUPPLEMENT -- BPA free and FDA approved hydration bladder OR water bottles equipped, pressure-tolerant and leak proof. Drinking the water by the tube directly or take it out easily whenever you need without taking your running vest off or stopping your steps. Convenient trail running backpack outfit
BREATHABLE + ADJUSTABLE -- Soft and thin mesh padding of hydration vest for optimal comfort and absorb sweat efficiently. The flexible adjustable straps help race vest hug your body nicely
LIGHTWEIGTH -- Ultralight hydration pack with wide and breathable shoulder straps distribute weight effectively, reduces strength consumption. The cycling backpack provide you with the max support and min burden
UPER POCKET -- You can carry everything you need with the water backpack. Super pocket design that your water bottle, phone, keys, foods can easily stored in the front pack pockets, and bladder or other items can be held in the back one
EXTENSIVE APPLICATIONS -- The waterproof and sturdy running water vest aims to accompany your trip of Jogging, Running, Marathon, Hiking, Climbing, Cycling, Walking, Backpacking, etc. Triwonder hydration backpack is always be there for you

Description

Size (Chest Circumference):
* S-M: 31.5 - 38.2in
* L-XL: 38.2 - 43in

Specifications
- Applicable: Unisex
- Material: Nylon + Polyester Net
- Volume: 5L
- Size: Free
- Weight: 8.46oz
- Use for: trail running, road running, night running, cycling