Bear mattresses are actually fiberglass-free. The company prides itself on using safer alternatives for their fire barriers. Instead of fiberglass, they use flame-retardant rayon, which is both effective and safer for you to sleep on.
This is a big plus because fiberglass in mattresses has been a concern for many people due to potential health risks if it escapes from the mattress cover. Bear's choice to go fiberglass-free shows they're really thinking about your health and peace of mind.