Runecrafter robes are a reward from The Great Orb Project, come in three colours, and include a hat, gloves, robe, and skirt. All Runecrafting items cost 1000 runecrafting guild tokens a piece. There are no requirements to wear the robes, besides 50 Runecrafting which is needed to enter the Runecrafting Guild and play the minigame. Alternatively they can be bought in Stanley Limelight Traders shop for 135 thaler per set, thus bypassing the runecrafting requirement. They provide no combat bonuses and are worn for cosmetic purposes. All three sets can be stored in a magic wardrobe.
Runecrafter robes were the best robes available to free to play players in terms of magic attack and defence, but with the Evolution of Combat the robes had all their combat bonuses removed, making them essentially cosmetic gear.
They also offered a slightly faster bonus in the minigame.