STREAM TRAIL Kozu Backpack CAMPING & HIKING The middle technical layer is

The middle technical layer is a one-way membrane that regulates body temperature on the surface by keeping out wind and water but allowing water from the inner layer to wick rapidly away from the body

·         Adjustable bungee strap

it may be good for camping to carry a lot of materials once together

Additionally

STREAM TRAIL Kozu Backpack CAMPING & HIKING The middle technical layer isThis is the most common size for town use bags. KOZU BACKPACK has a built in pocket that can store a PC and small items. A backpack (rucksack) made in the most frequent size among town use bags. The waterproof and durable TPU material is used, and the flap is rolled down and sealed to make it even more waterproof. FEATURES: Material: TPU Size: W330mm x H480mm x D150mm