Buy RS3 Masterwork green cloth
Masterwork green cloth is a crafting material in RuneScape 3. It is used to make masterwork magic armour, the strongest craftable magic armour in the game. You need one Masterwork green cloth to make the Masterwork magic hat.
Making this cloth yourself is a big job. It takes level 110 Crafting and the achievement "It Should Have Been Called Ancestral". The materials are 10 Starbloom cloth, 1,000 Fungal flakes, 1,000 Grifolic flakes, and 1,000 Ganodermic flakes. Crafting it at a loom takes 250 progress steps, which adds up to 10 full minutes of work. It gives 2,500 Crafting experience when done.
Buying the cloth lets you skip the flakes, the Starbloom cloth, and the long time at the loom. That saves you a lot of gathering and crafting effort on the path to masterwork magic gear.
The item is members only, tradeable, and noteable. It weighs 1 kg. It is not stackable and cannot be disassembled or alchemised. It is always kept on death, so it is safe to carry.