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Spend and Save on All Sealy Mattresses, Bases & Headboards

Purchase any eligible Sealy mattress, base or headboard and meet the minimum spend threshold between 04.08.2025 - 31.08.2025 and save up to £500 OFF instantly.


On eligible items, spend between:
£500 - £749.99 Get £150 off
£750 - £999.99 Get £200 off
£1,000 - £1,499.99 Get £300 off
£1,500 - £1,999.99 Get £400 off
£2,000 or more Get £500 off
Valid for orders placed between 04/08/2025 - 31/08/2025

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Offer Terms & Conditions
Qualifying orders must be placed between 04/08/2025 - 31/08/2025 on www.costco.co.uk. To qualify, the order must contain: a) any qualifying Sealy mattress, base or headboard and b) a minimum spend of £500.

Warehouse purchases do not qualify for this promotion. Limit of one discount per member. Offer is strictly non-transferable, and cannot be sold or exchanged for cash or combined with any other offer or changed for any different voucher value. Costco reserves the right to reject the use of this promotion with reasonable cause.

Disposal services do not contribute towards the qualifying basket total / spend.