Our Flannel Sheets are made to fit mattresses of all types, from thin to thick, with a deep pocket that accommodates up to 17-inch deep mattresses. The fitted sheet features wide corner straps and a secure 360° elastic to keep your sheets in place all night long, so you can sleep soundly without worrying about slipping sheets. Available in an array of six soothing colors, our sheets complement any bedroom decor, allowing you to create a cozy and personalized space.