The Model 460 Bolster Cot Mattress features beveled side bolsters that cradle the patient to provide a greater sense of security, and to minimize lateral patient movement. Vinyl-coated nylon cover is abrasion and fire-resistant, bacteriostatic, and will not absorb blood or bodily fluids. Compatible with Model 35A, Model 30NM, and Model 93ES cots. - See more at: http://www.fernoems.com/en/products/ambulance-cots/mattresses/model-460-bolster-cot-mattress.aspx?ec_trk=followlist&ec_trk_data=mattresses#sthash.tiLVlIwe.dpuf