I gave up trying to find an acceptable foam play mat for Fergus and Sweet William.
Many mats are made from EVA (ethylene vinyl acetate), which is safer than PVC, but doesn’t guarantee that they are free of endocrine-disrupting phthalates. Some manufacturers will not say that their mats are PVC-free. Some mats are treated with flame retardants. Back in 2010, independent testing revealed that foam mats made in China contained formamide, a toxic industrial chemical; France and Belgium subsequently pulled them from store shelves.
A couple of weeks ago I discovered that Under the Nile makes rag rugs from scraps of its 100% organic cotton fabric. I ordered one, specifying “boy colors,” and received this beautiful, 4 x 6 foot rug, made from the same fabric as Sweet William’s onesie and Fergus’ convertible “baggie.” It’s easy to fold up and move around and it’s a great surface for the boys to play on. Problem solved!