As the nights get colder it's a great idea to switch your sheets to more winter appropriate materials. Cotton covers are breathable, yet still warm to keep you at the right temperature, with brushed cotton offering a soft-to-the-touch finish. Velvet, corduroy or teddy-cotton fabrics are becoming more popular for their cozy qualities. Though if you're a hot sleeper, we'd recommend adding a quilt, bedspread or one of the best weighted blankets to your bed for an extra layer you can add or take off as you need.