Perpignan Mattress Topper Fitted Bed Sheet. Super soft and perfect for lying back on after a hard day, the Perpignan Fitted Sheets for mattress toppers were designed with a shallow depth of up to 10 centimetres.

We used 200 TC mercerised cotton for this collection for a soft but durable finish. With elastic corners for easy fitting, our high-quality Perpignan fitted sheet has been designed in muted colours to complement most décors and will serve as a cool and welcome place to rest.

Which? Mattress reviews.

Our body support tests, for example, use special equipment to measure the shape of our test subjects' spines at 36 different points. When you're lying on your back, a good mattress should keep your spine in the same shape as when you're standing, while your spine should be parallel to the mattress when you're lying on your side.

Which? Mattress Reviews.

So, we measure the shape of a person's body at 36 different points when standing, and then again when lying on their back on the mattresses, to see how well they compare. If you're a side sleeper, your spine should be parallel to the mattress, so we use a laser to measure the angle of a person's spine relative to the bed.