Most listings describe thumb grips and joystick caps as made from durable silicone, chosen for a non‑slip surface and to protect joysticks from wear and dirt.
Most thumb grips are installed by stretching or flipping the cap outward, fitting it over the joystick, then releasing and rotating to align. For removal, many caps can be turned inside‑out and popped off so they can be reused.
They add a non‑slip surface and slight height for more comfortable play, reduce thumb slipping, extend analog reach for finer control, and protect joysticks from dirt, grease, and wear.
Many character or themed sets include four caps (commonly two main character caps plus two coordinating caps); product listings often state something like “4 x Joystick Grip Caps.”
Bundles often pair a comfort grip with extras such as rubberized grips, a wired nano controller, an 8 ft USB cable, a protective case (with storage for game cards and microSD cards), and an integrated play stand—contents vary by kit.
Grips themselves are listed with compact product dimensions, while controller bundles and packaged kits show larger package dimensions. Example listings include small item dimensions like “1 x 5 x 7 inches (H x W x D)” and bundle/package dimensions like “1.97 x 5.31 x 10.43 inches (H x W x D).”