Linen Superstore 50/50 Cotton Percale KING Waterbed Sheet Set with FREE Stay Tuck Poles - Black 200 Thread Count 50% Cotton / 50% Percale Designed specifically for a hardside waterbed mattress Fitted sheet and flat sheet is attached at the bottom KIng sheet set includes: a fitted sheet and flat sheet + 2 King size pillowcase MADE IN THE USA. FREE SWATCH email info@linensuperstore.com for any questions or inquiries.