Extends the human coccyx into a fully articulated, muscle-sheathed tail ranging from 60 cm to 120 cm in length. The basic cosmetic version is covered in skin matching the user's complexion and can grip objects lightly — enough to hold a drink, not enough to swing from a railing. Premium versions from Crucible Genomics incorporate prehensile musculature strong enough to support the user's body weight briefly. Fur-covered variants using spliced feline or canine follicle genes are enormously popular among younger demographics. The tail requires its own neural integration period — most users report the tail feeling like a phantom limb for the first month before proprioception develops fully. Tail fashion in GLMZ is a major industry: wraps, rings, sleeves, tip jewelry, and color-matched fur dye are sold in every market in the Shelf.