Two-layer-design: it is made of 1 memory foam top layer plus a firm base foam for better comfort (Although it is more expensive to manufacture such a product, it does give the benefits of letting you experience a more comfortable, soft feel of the cushion while the firm base foam providing the support you need);Helps with acid reflux, snoring, allergies or any other condition which breathing may be impaired in supine position. It provides a healthy, more comfortable night's sleep.;Comes with machine-washable, white cover. Note: based on the number of people who want to purchase extra pillowcases for this wedge pillow, we have just released an optional 400 thread count, 100% Egyptian cotton pillowcase on Amazon (sold separately and available after 12/10/2014).;Designed for patients with acid reflux, problem breathing, poor circulation, back or neck problems;Every product comes with the trademark InteVision on its packaging (Net product weight: 4.7 lbs)