These bags only hold items obtained in the mining profession, but are larger than the average world drop or craftable bag. Only 1 mining bag may fill a slot in a bank at any time.
“ Mining bags are special bags first made available in World of Warcraft: The Burning Crusade...Mining bag
“ Triple-Reinforced Mining BagItem Level 85Disenchants into: Not disenchantableBinds when...Triple-Reinforced Mining Bag
“ Mammoth Mining BagItem Level 75Disenchants into: Not disenchantableBinds when equipped32 Slot...Mammoth Mining Bag
“ Mining SackItem Level 60Disenchants into: Not disenchantableBinds when equipped20 Slot...Mining Sack