New Simmons Beautyrest Single/Twin XL Pillowtop Mattress for Sale Retails for $1049 Plus We Have 2 Available (2 make a king size) They are Extra Long Twin so Same Length as a King or Queen 1100 Pocket Coil count. Double Titanium Lumbar Support provides lower back pain relief. Beautyrest® Advance Coil Edge keeps the edge strong throughout the lifetime of the mattress. Dual Cool System combines Silver Fibre and Silver Fabric treatment which helps keep your mattress cool and fresh. 1” Gel Surface Technology.