Brentwood Well-Being Encore 8-Inch Quilted Pillowtop Inner Spring Mattress, Twin X-Long Brentwood Encore 8-inch Mattress uses high quality 13.5 gauge tempered steel spring coils for long lasting support Works perfectly with the Rest Easy Instant Fully-Assembled Box Foundation Extra thick layers of soft comfort foam and padded upholstery offer extra plush comfort so you feel rested and rejuvenated Mattress compressed and rolled for shipping, easy to carry and saves you money on shipping costs Twin XL Size: 80" x 38" x 8", Includes 1 Year Warranty