The heavy duty tamperproof mattress is made for comfort in the most extreme mental health environments. Its cover is made from a high performance PVC and is proven to be very strong, but also flexible for the occupant to sleep on. The mental health mattress cover has two layers of laminated PVC on the surface and is reinforced with an extra strong polyester yarn. This yarn is woven in a special weaving configuration for extra reinforcement. Along with its strength and comfort properties, this psychiatric mattress also has a cleanable surface, making it most suitable for extreme environments.