No, Nectar mattresses do not contain fiberglass. Here is exactly what the manufacturer says about the issue.
From Nectar:
Our Nectar US Memory Foam Mattresses are built to meet federal fire safety regulations, and are made with an industry-standard fire-retardant sock to protect consumers from fire hazards without the use of harmful chemicals.
In previous models, the fire-retardant sock on some of our mattresses could contain silica or glass fiber infused in the yarn or woven into the knit fabric to meet federal fire protection standards.
Our current models use a fire sock produced with other fire-retardant materials. In the event of a fire, the sock encapsulates the mattress, providing a barrier from the fire.
In all of our models, the mattress and knit sock are covered by the outer mattress cover. We recommend spot-cleaning the outer cover only, and use of a water and stain-resistant mattress protector. Removing the outer cover will void the warranty and may result in disruption to the protective fire sock or mattress layers.
While at the surface, this sounds like Nectar mattresses do not contain fiberglass, the answer provided here feels a little blurry for such a black-and-white issue.
-Nectar
