It was a mystery one concerned mother had to solve: why was her 6-month-old daughter waking up with cuts on her legs and red, blotchy skin? Vanessa Gutierrez was shocked to discover that the alleged source of the injuries was her mattress leaking out fiberglass particles. And Gutierrez is not alone. She’s now part of a class action lawsuit against the maker of the mattress, Zinus. The brand is sold at Amazon, Walmart, Target and other stores.