I chose this Purity Home Organic Cotton Percale Pillowcase Set to upgrade the linens in my master bedroom. It is often hot and humid where I live, so it's important that I get a restful night of sleep where I'm not sweating. These pillowcases stay cool while I rest my head on them and they are incredibly cool to the touch. I can't wait to replace the rest of the pillowcases in my house with these!