Backpack is also a wonderful item in Rules of Survival game. You will have to wear this stuff in order to carry some things, like weapons, some items, and other supplies. But, your backpack will have a different storage capacity when you level it up. At level 1, it only grows the storage capacity by 150, but it will reach 200 at level 2, and reach up to 250 at level 3. Having larger storage capacity is great because you can carry more items.
Backpack Lv 1
Increase 150 carrying capacities to carry more properties.
Backpack Lv 2
Increase 200 carrying capacities to carry more properties.
Backpack Lv 3
Increase 250 carrying capacities to carry more properties.