1/4 neoprene closed cell foam. great for motorcycle seats. sheet of 16x15

Neoprene is the best way to create and shape a custom motorcycle seat. If your building a seat from scratch for a steel or fiberglass pan, covering it with neoprene is pretty easy. It shapes very well with an air grinder or even hand tools like a drywall or bodywork wrasp.

Foam seat pad EVO 3 version 2 for race seat + rear foam pad

FanFlex: Lightweight flexible crests and patches that fold easy. - FanTex: An all-new super comfortable soft fabric. - FanFit: The authentic on-ice

Sponge Neoprene 1/4 Thick X 54 Wide X 1 by CLEVERBRAND INC.

Leather Repair Patch Leather Repair Kit Self - Temu

Helio A7 Ultralight Wheelchair Ultralight Folding Wheelchairs

RIKOL 3D Motorcycle Seat Cushion Heat Insulation And Sun

Siless Liner 157 (4 mm) Mil 180 Sqft Car Closed Cell Foam & Heat Insulation Mat - PE Foam Material & Heat Barrier

NEOPRENE FOAM – SOLD BY THE SHEET (51 X 83) - Foam Mart

Motorcycle Seat Foam

Motorcycle Seat Pads - RevZilla