1. Twin XL mattresses are considered the standard size for loft beds and bunk beds at college dormitories and residence halls. They're just as wide as regular twin mattresses (39 inches) but, at 80 inches long, they're 5 inches longer than the 75-inch twins.

2. A full mattress may be just one size up from a twin loft bed mattress, but the difference in width is significant. Full loft bed mattresses are 54 inches wide - 15 inches wider than twins - and 75 inches long.

3. Memory foam loft bed mattresses are the next generation in supportive sleep solutions. Made with high-density foam that responds to your body's temperature or pressure, a memory foam mattress will mold itself to your shape and decrease pressure points for dream-worthy sleep.

4. Our Otis loft bed mattresses have designated zone numbers indicating the type of support they provide. If you're looking for an extra firm mattress, then an Otis Zone 9 might work for you. Zone 1 provides softer, pressure-relaxing sleep, and mid-zone numbers offer a balance of firm and soft.

5. Using an appropriately sized mattress for loft beds is one of the fundamental guidelines of loft bed and bunk bed safety as issued by the Consumer Product Safety Commission (CPSC). Also, never use an air mattress or water bed mattress in place of a spring or foam loft bed mattress.

6. Another important guideline from the CPSC for a loft bed with mattress: The tops of the guardrails must be no less than 5 inches above the top of the mattress. Guardrail gaps should also be no larger than 3.5 inches.

7. Loft beds and trundle bunk beds usually take twin mattresses, but it's best to check the manufacturer's size description for each individual loft bed, as some may take full mattresses. Futon mattresses are also a popular choice for study loft beds due to their versatility.

8. Kind of like cake, but longer-lasting, foam mattresses come in many layered varieties. The number and type of layers determines how soft or firm a foam loft bed mattress will be. Find detailed descriptions on each product page to help you choose the support that's right for you.

9. One good thing about kids loft bed mattresses is that they're sized to fit teens and young adults as well. For that reason, it's often best to invest in a high-quality twin XL or full loft bed mattress that can last for many years rather than buy a low-quality twin that you expect your child to outgrow.

10. Stains are an inescapable part of the life of childrens mattresses. If you need to remove a surface stain, try dampening with water and then blotting the area (rather than rubbing it) with a soft cloth and laundry detergent or peroxide. Another solution is a washable mattress pad or mattress topper.