Black Friday deals from Best Buy are usually posted in November when their Black Friday Flyer is released. Meanwhile, you can see Black Friday Deals from 2016 season (from last year) by clicking below. Checkout all BestBuy Black Friday Deals.
Fumes are harmful more because of what they do to the brain and your body overall, but the biggest dangers of breathing in fiberglass is that the fibers from the insulation can make their way into your lungs.
Although the fiberglass itself is waterproof, the padding inside a fiberglass cast is not. So it's still important to try to keep a fiberglass cast from getting wet. If this is a problem, talk to the doctor about getting a waterproof liner.