Green dragonhide is a 100% drop from green dragons. It can be tanned to make green dragon leather, which in turn is used to make green dragonhide armour. The hide can be tanned to become green dragon leather by paying a tanner or by using the Tan Leather lunar spell. A tanner will charge 20 coins for each hide, or 45 in Canifis. Tanners can be found in Al Kharid, the Ranging Guild, Canifis and the Crafting Guild.
The 100% drop rate makes green dragon hunting a popular money making method for many