Rest Evercool Standard Artic White Pillowcase pairs a breathable percale plain weave with a performance fabric blend to keep sleepers cool and dry. The fabric blend is 80% nylon, 13% spandex and 7% ionic+silver nylon, with the silver-ion yarns helping to limit microbial buildup while the stretch ensures a snug fit on a standard pillow. Machine washable for easy care, this pillowcase is a practical upgrade for hot sleepers and anyone seeking a fresher, more comfortable night's rest.