Snap Grip - flat and slim which allows you to store it in any slim case without removing it when you're on the go. Trigger Grip - provides stronger grip force, it is designed for players with bigger hands and play FPS/TPS games very often. Plus Grip - for extra-large hands. All grip sets are made of hard PC (polycarbonate) with texture on the surface, which gives players a similar feeling of holding an XB1 controller.