Luxury Solid Cotton Deep Pocket Flannel Sheet Set Size: Twin Extra Long, Color: Cashmere This 23" deep pocket sheet set includes one flat sheet, one fitted sheet and one pillow case. Extra Deep Pocket Flannel Sheet Set 170-Gram. Triple-brushed for softest finish and feel and brushed on both sides. Feature double-pleated detailing along the cuff on pillowcases and flat sheet.