Best quality pre washed cotton percale single pillowcase these adrio cotton percale pillowcases feature a lovely bourdon trim combining the softness of pre washed percale with a lightly crinkled lookfeatures pure pre washed cotton percale a luxurious hard wearing and very densely woven fabric 80 threadscm made from very fine long combed cotton fibres the higher the thread count the higher the quality of the weave pre washing makes the fabric softerand gives the colours a super tre