Hinari between the backpack and the back.
This is an ice pack case for backpacks that reduces sweat and stuffiness in your backpack during the hot summer.
Add a commercially available ice pack to keep your back cool.
Prevents heat stroke during backpack style.
Can also be used with school bags.
The black color is used to make it stand out when attached to a backpack, and the interior is made of aluminum to keep you cool.
Main unit: Approx. 5.9 x 7.9 inches (15 x 20
Weight: Approx. 0.9 oz (25 g).
[Material]
Outer Fabric: 100% polyester.
Back Fabric: 100% polyester (aluminum processing).
Belt: Polypropylene.
[Fastener/Button] : Polyethylene