Rotatable to the natural angle of your thumb position, and with 3 sizes in a pack, the medical grade silicone sniper thumbs will make you wonder why thumbsticks are round! Each pack contains three pairs, each differing in size. Ergonomic deep groove for a solid contact and perfect fit. Rotational counter and clockwise for perfect thumb alignment. Medical grade silicone, with tiny dimple texture on the perimeter for anti-slip grip.