About the Double Thick 2-Piece Mattress Pad & Comfort Topper: Includes our best-selling Mattress Pad and a 1.5" Memory Foam Mattress Topper for double the thickness Each pad is filled with Revoloft™: a state-of-the-art polyester filling designed to resist flattening for lasting comfort Double stitch baffle box stitching traps fill and prevents shifting The unique elastic fitted skirt creates a snug fit for mattresses up to 18" thick What's Included & Dimensions: Twin Size: (1) Mattress Pad 39" x 76", (1) Memory Foam Mattress Topper 39" x 75" x 1.5" Twin XL Size: (1) Mattress Pad 39" x 80", (1) Memory Foam Mattress Topper 39" x 79" x 1.5" Full Size: (1) Mattress Pad 54" x 76", (1) Memory Foam Mattress Topper 54" x 75" x 1.5" Queen Size: (1) Mattress Pad 60" x 80", (1) Memory Foam Mattress Topper 60" x 79" x 1.5" King Size: (1) Mattress Pad 76" x 80", (1) Memory Foam Mattress Topper 76" x 79" x 1,5" Cal King Size: (1) Mattress Pad 72" x 84", (1) Memory Foam Mattress Topper 72" x 83" x 1.5" Assembly Instructions: Step 1:  Remove the Memory Foam Topper from the bag. Lay flat on any surface.  Allow 24 hours for the memory foam to expand to full size. Step 2:  Remove the  Mattress Pad from the bag. Step 3:  Place the Memory Foam Topper on the bed first. Then place the mattress pad on top of the memory foam topper with the quilted side facing up. Step 4:  Pull the skirt of the quilted topper down over both and tuck under the mattress.  Step 5:  Sleep well!