Extra Deep Queen Sheet Set - 6 Piece Breathable & Cooling Sheets Microfiber Queen Navy Blue Striped EXTRA DEEP POCKET QUEEN SHEETS / EXTRA DEEP FITTED QUEEN SHEETS: These bed sheets are for very deep pocket mattresses. They fit any mattress with pockets that are 18, 20, 21, 22 and 24 inches deep. There's stretchable elastic around the extra deep fitted sheet which stretches for a nice tug around your mattress. Perfect for extra tall & large mattresses. Rest assured these oversized sheets will stay on tight & stay in place. GREAT FOR DOUBLE PILLOW TOP MATTRESS: These bed sheets are perfect for mattresses with a 3 inch or 4 inch topper on top, memory foam toppers, big mattress pads, pillow tops, foam toppers, big foam toppers, pillow top mattresses and memory foam. These sheets will not come off.