I have purchased sheets and duvet covers from Secret Linen before and been very happy with them. I needed a new mattress cover and chose the cotton one as I prefer natural fabrics. The quality is fine but I had not appreciated how heavy it would be, especially when wet. I washed it when it arrived to deal with the initial shrinkage and it nearly destroyed my washing machine. The machine could not spin it because of the weight and wringing it by hand was also near impossible. I eventually got it dried but it is not a practical cover for me in the longterm. It was also still a bit too large for my mattress even after washing. Probably should have gone for the polyester one but will in any case have to source an alternative.