King Size Bed in a Box Mattresses

Bed in a Box mattresses are the easiest mattresses to deliver to your home, without compromising on comfort. Browse our full range below and find a wide choice of size and firmness options, all with Free Next Day Delivery!

For other king size mattresses, why not go to our dedicated king size mattress page.

These handy mattresses arrive boxed or rolled up, making delivery super-quick and convenient. Open up your mattress in a box and it will spring into shape, offering the same support and comfort as a traditional mattress, but without the hassle of carrying it.

Ideal to carry and fast to deliver, these mattresses are also a great choice if your bedroom isn't quite ready. You can take advantage if you're moving house or redecorating, since a mattress in a box can be neatly stored in a room of your choice.

Whether you're looking for a latex, memory foam or pocket sprung mattress, you're sure to find the right choice in our bed in a box collection. We also offer all sizes, including double, king size and superking - even the biggest mattress can fit into a box!

What's more, because they're so easy to store, we always have stock available. Discover our bed in a box mattresses today and find your perfect fit for less with our latest offers.