Buy any Kingsize Mammoth mattress and only pay the price of a Double, or buy a SuperKing and only pay the price of a Kingsize.

Upgrading your mattress and your sleep with this winter.

Find your Local Mammoth Stockist

Terms & Conditions

  • Available at participating stores only.
    Not all stores run the same promotions, please contact your local stockist to find their latest promotions.
  • Buy any Double Mammoth Mattress and upgrade to a Kingsize for FREE.
  • Buy any Kingsize Mammoth Mattress and upgrade to a SuperKing size for FREE.
  • Only available on orders placed from 26/012/17 to 25/02/18.
  • Upgrade applies to mattress only and/or performance divan sets.
  • Upgrade does not include standard divan or headboards.
  • Not to be used in conjunction with any other offer.
  • Adjustable beds not included in this promotion.
  • Saving of £300 is based on a purchase of a SuperKing Pocket 3000 mattress at the price of £1999 and a saving of £300 if purchased from a participating store from 26/12/17 to 28/02/18.