Figure 5.

Low-power reflected-light stereozoom microscope images of FG-4 mattress subsamples acquired at 10×. (a) White, synthetic, woven outer surface of outer cover material. (b) White, synthetic inner plastic sheet surface of outer cover material. (c) Inner cover material consisting of synthetic fibers in polymeric binder, and short straight fiberglass fibers sticking into surface (indicated by arrows). (d) Inner sock material, showing woven threads consisting alternately of white synthetic fibers and shiny/clear fiberglass bundles.