Made of robust, durable and water-repellent Oxford fabric material, length-adjustable, ergonomically shaped shoulder straps with mesh padding, slightly reinforced bottom of the bag. The picnic backpack is beautifully thick insulated and has lots of pockets with zip. Even a multifunctional tool is stored in a shoulder strap and the other strap has a zip pocket again. The bag is large enough to fit everything possible and it cools great. The cold is retained for a long time thanks to the inner coating, no problems with sweaty food and warm water. It is a good idea for summer, camping and hiking to take iced drinks outside with this backpack. The effect of heat insulation is very good. The frozen food will not freeze within 6-8 hours and stick to each other.