A piece of advice about backpack skins

[NexusMercer]

there are too many backpack skins, while a few Krampus Sack,Insulated Pack and Piggyback skins.There are too many backpack skins, while a few Krampus Sack,Insulated Pack and Piggyback skins.  Maybe it is better that the backpack skins can be used in all of the bags. If it is hard to make it, we can only modify the skins of Proof Of Purchase. I have all the backpack skins of Proof Of Purchase,but the volume of the backpack is too low, it is hard to get the balance of the skin and volume.