A typical mattress is composed of multi layers: an upholstery layer (padding) and a inner comfort block layer. The upholstery layer is largely responsible for the firmness of the mattress, while the inner block layers offers support and some flexibility. Thicker mattresses typically have thicker upholstery layers that are made from a variety of materials such as natural fibers, different types of foam (including memory foam and latex foam), and different man-made materials. Some mattresses even have padding that is made from silk, cashmere, or wool.

In international market Mattresses come in 7 international standard sizes: twin, twin XL, full, full XL, queen, king, and California king that come in the following dimensions: and can be made to order.

• Twin: 39” x 75”
  
• Twin XL: 39” x 80”
  
• Full: 54” x 75”
  
• Full XL: 54” x 80”
  
• Queen: 60” x 80”
  
• King: 76” x 80”
  
• California King: 72” x 84”

While it is recommended that you replace your mattress at least once every 5 – 7 years, there is no cut-and-dry number for every mattress and every individual. The quality of your mattress is one of the many factors that determine how long it will last. Higher-quality mattresses will generally provide a comfortable night’s sleep longer than low-quality mattresses. Aim for the recommended 5 – 7 year replacement period, but if your mattress begins to feel uncomfortable sooner than that you should have it replaced in order to ensure a high quality of sleep.