King Size Which? Best Buy Awarded Mattresses

Shop our Which? Best Buy mattresses here at Mattress Online! These mattresses have received a coveted Which? Best Buy endorsement - including our very own Horizon Discovery 1500 Pocket Memory Mattress!

The largest independent and unbiased consumer organisation in the UK, Which? has been testing products and services for over 60 years. Helping to raise standards and champion product safety and quality, the trusted brand has a first-class reputation for consumer advocacy.

Take the stress out of mattress shopping - the seal of approval of a Which? mattress helps you to shop in confidence. With the brand's endorsement, you can count on value, quality and high-performance. Its product testers are trustworthy, knowledgeable and completely independent, which means that their product recommendations rank amongst the best.

We offer a fantastic range of Which? Best Buy mattresses from a range of well-known brands including Silentnight and Sealy. From memory foam to pocket sprung mattresses, and bed-in-a-box-style mattresses to luxurious pillow-top mattresses - you're sure to find the perfect mattress for you!