Take Bedgear's original Stretchwick® protector, add a cooling touch to the top layer, and voila; the Bedgear's Stretchwick 3.1 Mattress Protector. Featuring all-way stretch, this flex and fit protector, includes motion activated technology, yielding resistance free comfort, during sleep. No overheating with this combination, in which cooling fibers are integrated at the surface of the fabric. Meanwhile, at the back of the protector, an invisible and waterproof barrier, it does not impact the comfort feel of the mattress, but has a conforming surface, which also resists fluids and stains, as well as mold and mildew. In addition, the Stretchwick® 3.1 Mattress Protector helps reduce any build-up of dust mites, pet dander or any allergens in the bed. All lightweight materials, it allows air flow constantly, so sleepers are more comfortable. Easy care and maintenance, the Stretchwick® 3.1 is machine washable and dryable, fitting mattresses in profile height from 8" to 18"; complete with a breathable skirt, that allows ample stretch to fit and grip the mattress, to stay, successfully in place. Stretchwick® 3.1 is available in all mattress sizes. Please note, this product is non-returnable once opened.