Featuring nine heat settings and a useful climate zone control, you can set your preferred temperature with Snuggledown's luxurious underblanket. It fits under your fitted sheet with elastic fittings. The single size has one controller while the double, king and super king sizes come with two controllers. There's also extra foot warmth which will help to keep your whole body toasty on very cold nights. It's just what you need when the temperature drops. Key features: An incorporated quilted comfort layer provides enhanced support alongside your mattress The outer cover can be removed from the electrical component and it's machine washable Made from 180 thread count pure cotton, the naturally temperature regulating outer cover is a breathable surface that helps to wick away moisture Worth knowing Ensure the product is completely dry before use. Before washing, disconnect the heat controller from the electric blanket. This product is not suitable for children under 3 years old.