GhostBed, a U.S.‑based mattress‑in‑a‑box brand under Nature’s Sleep, offers a variety of all‑foam and hybrid models—such as the Classic, Luxe, Flex, and 3D Matrix—designed to deliver advanced cooling comfort using proprietary materials like Ghost Ice fabric, gel memory foam, and the Ghost Bounce layer . Mattresses typically come with generous 101‑night sleep trials and long warranties (20 or 25 years, depending on model), plus free shipping and returns within the trial periodThe Luxe model is often praised for its ability to stay cool while contouring around shoulders and hips—ideal for many side sleepers . Hybrid models like the Flex and 3D Matrix add springy support and enhanced airflow with reinforced edge coilsHowever, a notable number of users report severe issues with GhostBed’s customer service, especially around cancellations and returns. Complaints include fees for refusing shipping, delayed or withheld refunds, restrictive interpretation of the 101‑night trial, and the requirement to donate returned mattresses rather than a straight refund.