These bags only hold items obtained in the leatherworking profession, but are larger than the average world drop or craftable bag. Only 1 leatherworking bag may fill a slot in a bank at any time.
“Leatherworking bags are a specific type of bag that can hold leather, skinning knives, and other...Leatherworking bag
“Leatherworker's SatchelItem Level 65Disenchants into: Not disenchantableBinds when equipped20...Leatherworker's Satchel
“"Carriage - Meeya" Leather BagItem Level 35Disenchants into: Not disenchantableBinds when..."Carriage - Meeya" Leather Bag
“Bag of Many HidesItem Level 70Disenchants into: Not disenchantableBinds when equipped24 Slot...Bag of Many Hides