These protectors are made from cool, breathable cotton. Easy to care for and quick- drying, with zips to fully enclose your pillows. Suitable for Regular Washing Washable at 40?C, allowing for an effective clean that's much kinder to the environment. 200 Thread Count This number refers to the density of threads per square inch: generally, higher thread counts mean a softer and smoother feel. Please note: This product features a zip closure to ensure a snug fit.