200 count 30cm cotton percale fitted sheet provides you with the smoother handle of a higher thread count, the natural qualities of cotton and the durability and easy care properties of polyester with minimal ironing required this is an ideal choice for the modern, busy household. This range is one of the best 50% combed cotton / 50% Polyester available. This fitted sheet has a depth of 33cm (13"). This sheet is available in two sizes. As mattresses get deeper with the addition of mattress toppers, protectors, need sheets to allow for a good snug fit and avoid the common problem of sheets coming off during the night. Recommend this fitted sheet to sit 8cm (2-3") deeper than your mattress. Fitted sheets are generously elasticated around all 4 corners leading to a solid hold and fit on your mattress. This fitted sheet is suitable for mattress depths up to 25cm (10"). So long as you purchase the correct size of width and length then depth doesn't have to be exact, as any extra fabric tucks underneath the mattress, hence why recommend taking a slightly larger depth than what your mattress measures.