A thinner, high-quality mattress protector that keeps your mattress clean and fresh for longer while reducing wear. The upper is made of soft terry cotton and the underside of durable polyurethane (plastic material), which makes it watertight. Practical if you have small children who can wet the bed. Protects against mites and is minimally heat reflective. The protector is easy to put on and take off. Elastic in each corner holds it in place. Sewn with shrinkage allowance and shrinks to the correct dimension after the first wash.