St. Michael Firm Twin XL Mattress

This firm Twin XL mattress is designed to deliver stable support with a comfortable, responsive feel. A four-way stretch knit cover helps the comfort layers adapt more effectively to your body for a more balanced sleep surface.

Inside, a gel-infused foam layer adds contouring comfort and helps regulate temperature, while multiple ultra-firm foam layers and a high-density fiber pad reinforce long-lasting support. An 8-inch zoned fabric-encased coil system with a strong foam border provides targeted support and a more usable sleep surface from edge to edge.

Key Features

• Four-way stretch knit fabric enhances comfort layer performance
• Gel-infused foam conforms gently and helps sleep cooler
• 8-inch zoned encased coils provide personalized support
• High coil density promotes a stable, supportive feel
• Strong foam border improves edge support
• Ultra-firm quilt foam adds durable body support
• Ultra-firm upholstery foam reinforces long-term stability
• High-density fiber pad boosts mattress support and structure

This Twin XL mattress measures 79 in. deep, 37.5 in. wide, and 11.5 in. high, with an assembled weight of 21 lbs. It includes a 1-year manufacturer warranty.