Thick cotton flannel, brushed many times to generates an incredibly soft hand. These weighty six-ounce sheets are luxuriously comfy and warm. The flat sheet and pillowcases have a 4" self-hem. The fitted sheet has a deep 15" pocket and full elastic around the bottom for an easy fit. Set includes one flat sheet, one fitted sheet and two pillowcases. Twin set includes one pillowcase. Warranty length: 1 year.