Maelstrom Hydration Backpack with 2L Water Bladder,Lightweight Running Vest | BPA-free,Breathable Shoulder and Back panel,Adjustable Chest Straps,Helmet Storage,Reflective Strip,for Cycling,Marathon

All-in-One Hydration Solution. Maelstrom hiking backpack with water bladder combines durable nylon construction (1.1 lbs total weight) with 4 storage pockets and an aluminum-lined bladder sleeve for leak-proof, insulated cooling—perfect for hydration backpack enthusiasts.

Hands-Free Hydration System. Designed as a running hydration vest, the main compartment fits a 2L water bladder, the water bladder is made of durable PEVA material (BPA-free)，while shoulder strap hose ports enable easy sipping during hikes or runs.

Helmet Storage & Reflective Safety. External clips secure your cycling helmet, and reflective strips enhance visibility, making this water backpack ideal for men and women tackling outdoor adventures day or night.

Universal Comfort Fit. Adjustable chest straps from 22.4–61 inches ensure a custom fit for all body types, labeling it a go-to hydration pack for men and women.

Breathable & Versatile Design. Engineered with a ventilated back panel and hydration ports, this water backpack doubles as a hiking backpack with water bladder and running hydration vest, catering to all outdoor enthusiasts.