Choosing the right size is a key part of finding the perfect mattress. Here are the standard mattress dimensions to help you measure your space and decide which size is best for you. This mattress is available in most of the sizes listed below.

• Twin: 38" x 75" — Ideal for children, bunk beds, and single sleepers in smaller rooms.
• Twin XL: 38" x 80" — A great choice for taller teenagers or for use in college dorms. Two Twin XLs also form a Split King.
• Full: 54" x 75" — Offers more width for solo sleepers and is a popular choice for guest rooms.
• Queen: 60" x 80" — The most popular mattress size, providing comfortable space for couples or a luxurious amount of room for an individual.
• King: 76" x 80" — The widest standard size, perfect for couples who want maximum personal sleeping space
• California King: 72" x 84" — Offers extra length for taller individuals, though it is slightly narrower than a standard King.

The Serenity Hybrid uses a multi-faceted approach to cooling. The primary technology is the PCM (Phase Change Material) woven into the cover. PCM is a smart material that actively absorbs and releases body heat to maintain a balanced and comfortable temperature throughout the night. This is supported by breathable comfort layers like Serene® and GELTEX® foam, which have an open-cell structure that promotes airflow and prevents heat from getting trapped, unlike traditional memory foams.

A traditional memory foam mattress uses only foam layers for comfort and support. While excellent for pressure relief, they can sometimes lack airflow and responsiveness. The Serenity Hybrid combines the best of both worlds: it uses advanced foam layers like Serene Foam® for contouring comfort and pressure relief on top, but its core support comes from an innerspring system of individually wrapped coils. This gives you the bounce, edge support, and superior airflow of a traditional mattress with the body-hugging comfort of memory foam.

Yes, at Mattress King, your comfort is our top priority. Most of our mattresses come with a generous 100-night trial period, which is clearly mentioned on our product listings, both in-store and online. For those not eligible for the 100-night trial, we offer a 14-night trial period. To qualify for these trials, it's required to purchase one of our mattress protectors. Please note, during the trial period, if you choose to exchange the mattress, our delivery service must be utilized to facilitate this process. There will be a delivery charge applicable based on your location. This ensures a smooth exchange process and helps maintain the highest standards of hygiene and customer satisfaction. For complete details about the trial period and related policies, we invite you to visit our trial policy page.