<b>Extra Deep Pocket Fitted Sheets</b><br>These are the best sheets for extra tall & large mattresses; and great for mattresses with a 3-inch or 4-inch topper, double pillow top, memory foam topper or thick mattress pad.<br>A stretchable elastic all around the entire sheet ensures a tight, secure fit that won't ride up or move around in middle of the night, staying smooth, snug and wrinkle-free.