The Bestier Twin XL Cooling Gel 5-Zone Memory Foam Mattress Topper (Model #uslow-b900810c-busp) measures 38"W x 80"L x 4" thick — the perfect fit for a Twin XL bed. The 5-zone design targets different body regions (head, shoulders, lumbar, hips, and legs) for customized pressure relief, while the infused cooling gel helps regulate sleep temperature. This topper is in like-new condition in its original box with no damage noted. Ideal for college dorms, guest rooms, or anyone looking to refresh an existing mattress without the cost of a full replacement.