There are two options for the Delta Self-Inflating V Seat&n... There are two options for the Delta Self-Inflating V Seat line - the Regular or the more luxurious Deluxe seat. The Regular Seat is a rectangular, easy-to-pack companion which brings foam-filled comfort to any adventure. It&';s one and a half inches thick PU foam provides much-needed cushioning for aching glutes or cold, uncomfortable stadium bleachers. Tough, 75D polyester fabric on the base and upper surface also means it will go the distance. The Deluxe Seat is a fold-in-the-middle rectangle. Folded together, it provides a two inch thick super-comfortable seat pad. Unfolded, it provides a one inch thick sitting surface and back cushion. It uses 75D polyester on the base and a luxurious knitted 30D polyester on the upper surface. Features 75D polyester fabric on the base for durability. PU foam provides support and insulation