Some backpacks have the requirement of going into the first slot for the effect to be active. Example: Heart backpack, Soulhunter backpack
Some backpacks do not have this requirement. Example: Void backpack, Gathering Backpack, Santa Backpack
Some backpacks work as a relic. Example: Lilypad Backpack

Backpack	Image	Attributes	Where to obtain
Fur Backpack		Skill Value +2	Tanning
Camouflage Backpack		Skill Value +3	Tanning
Brocade Backpack		Skill Value +4	Tanning
Deepling Backpack		+5 fishing skill	Tanning
Expedition Backpack		+5 mining skill	Tanning
Wolf Backpack		+5 skinning skill	Tanning
Pannier Backpack		+5 woodcutting skill	Tanning
Mushroom Backpack		+5 farming skill	Tanning
Minotaur Backpack		Skill Value +7	Tanning
Glooth Backpack		Skill Value +9	Tanning
Crown Backpack		Skill Value +9	Tanning
Dragon Backpack		Skill Value +12	Tanning
Demon Backpack		Skill Value +15	Tanning
Crystal Backpack		Skill Value +22	Tanning
Feedbag		Skill Value +12	Seven Trials
Moon Backpack		Skill Value +24	N/A
Anniversary Backpack		Skill Value +18, +50% gold nugget find.	N/A
Heart Backpack		Skill Value +20, Protection all +3%	Promotion Item Trader
2nd Anniversary Backpack		Skill Value +21, Protection all +3%, Monster Essence +3%	Donation bonus during the second anniversary of Archlight!
4th Anniversary Backpack		Skill Value + 22, Monster Essence +5%	Obtained from 4th era anniversary event.
Cake Backpack		+7% Crafting Experience	Obtained from 4th era anniversary event.
Craftsman Backpack		Crafting Experience +10%	Promotion Item Trader NOTE: This backpack becomes soulbound once worn.
Gatherers Backpack		Energy Reduction +20%	Promotion Item Trader NOTE: This backpack becomes soulbound once worn.
Soulhunter Backpack		Damage +15%, Power +500, Protection all -10	Promotion Item Trader NOTE: This backpack becomes soulbound once worn.
Twilight Backpack		Having this backpack in your inventory grant extra rewards based on the following content: Events (2 extra Seasonal Event Token), Wargates (1 extra Wargates Currency, it includes final reward, killing challenger and chest), Daily Tasks (1 extra Daily Task Token), Training (1 extra Training Token) and Raids (+2 Raid Points)! It also grants +2% permanent Upgrade Chance increase.	Roulette