Several of the best boxed mattress brands, from Nectar to Casper, have been questioned over their alleged use of fiberglass. But what is fiberglass, why is it used in mattresses, and how can you ...

Experts share the differences between mattress toppers and mattress protectors. Plus, shop editor-approved bedding goods for your mattress.

That’s when she realized the problem was her mattress. Tiny pieces of fiberglass were coming out of the Casper mattress. “I go into my room, pull back the cover of my sheet and then start ...