These range from smart gathering to inventory restocking, from quickly depositing items to persistence through death, from visual indicators of fullness to compressing items on-the-go, and so much more.Over 20 different modular upgrades that allow you to customize the abilities of your backpack.The ability to equip the backpacks and have them visually appear on your player.4 tiers of backpacks, with specializations for higher tier backpacks (more storage versus more upgrade points).