In the United States, every mattress needs to pass a fire burn test, and so, a good fire-resistant fabric is needed to achieve this goal; using FR Sock is the best way, as it tightly covers the core of the entire mattress. The purpose of the FR Sock is to extinguish the flame quickly, so it cannot spontaneously ignite and cause a larger area of burning.

So we use the best fireproof materials to make FR Sock. It is not toxic fiberglass, it does not contain any chemicals, and it has passed the most advanced testing standards.