What our sleep experts found
The first thing you'll notice about this mattress is the added pillow top comfort layer. The second thing you'll notice is how it feels like you're sleeping on a cloud. Designed by historic and well-renowned bed experts Harrison Spinks, this mattress is designed to last, evident by the impressive 5 year guarantee.
The Harrison Spinks Cotterdale 13250 Pocket Pillow Top Mattress is so luxurious you'll think you're sleeping in a cloud. This mattress is hand-crafted in Yorkshire, England using the finest cashmere, silk, mohair and Yorkshire wool. You'll enjoy great support with 13250 pocket springs which are designed to distribute your body weight evenly for a blissful night's sleep.
The Cotterdale is also a no turn mattress, this doesn't mean that it shouldn't be rotated evenly throughout the seasons but that flipping is not required. The benefit of this is that mattresses, particularly ones with 13250 springs in them, tend to be on the heavy side and so rotation will be enough of a workout.
One of the more common downsides of a no turn mattress is that since the comfort is only on one side, it is less durable over time, however, thanks to the extreme quality on offer, the materials used typically offset the additional durability found in dual sided mattresses.
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Published: 8 October 2025 · Updated: 15 March 2026
Written by
Becky Reeve , Editorial Director, Mattress Expert
Peer reviewed by
Ray Summer , Health Content Writer & Editor