In World of Warcraft, connective skin can be obtained by collecting and peeling skins. After the collection level is increased, you can purchase heavy connective leather blueprints to learn how to make heavy connective leather from connective skin. The blueprints can be purchased in the blood elf main city, draenei main city and Shattrath city. The price is 5 gold.
1. After the leather level reaches 325, you can go to Shattrath City, Blood Elf Main City, and Draenei Main City in Outland to purchase it.
2. Find NPC Cru Thread in Shattrath City (67.4, 67.6)
Exodar looks for Harfret (66.6,73.7)
Find Salalda in Silvermoon City (84.8,78.6)
3. It costs 5 gold to buy, the item level is 65, and it requires 325 leather making . After using it, you can learn to make heavy connective leather.