All custom leather motorcycle seats start out with a thorough assessment of the seat pan. It is strengthened and modified if necessary before any work begins. All edges are wrapped in leather to reduce abrasion. The type of foam used depends on the seat. I use high-density polyurethane foam for thicker seats. This foam is antimicrobial and antibacterial. No worrying about crap growing in your seat from sweat, rain, or who knows what else.