The mushroom texture gets its title by looking like the classic fins on the underside of a mushroom. This is important so that the fin can be compressed by the hand and flex into the space next to it.
Peatys Monarch Lock on Grips - Mushroom - Thick
Peatys Monarch Lock on Grips - Knurl - Thick
Peatys Monarch Lock on Grips - Knurl - Thin
Peatys Monarch Grips - Knurl - Thick
Peaty's Peatys Monarch Grips
DMR Gridlock Lock-On Grips | MTB BMX Lock on Grip | Several Colours