Store Library › Drive Medical Bariatric Foam Mattress Image 1 of 1 Drive Medical Bariatric Foam Mattress $350.00 sold out High-Density foam mattress for the bariatric patient.The nylon top cover is fluid-resistant. Vinyl bottom is waterproof. Sold Out Added! High-Density foam mattress for the bariatric patient.The nylon top cover is fluid-resistant. Vinyl bottom is waterproof.