Fiberglass is a popular construction material for crash helmets, sometimes also known as glass-reinforced plastic or GRP. Fibers of glass are laid in a polymer such as epoxy resin or a thermoplastic to produce a very strong and durable matt of material that’s relatively cheap to produce but easy to mould into complex shapes. In a crash helmet, it makes for a lightweight and strong helmet with a shell that’s less brittle than carbon fiber and able to stand significant abrasion as well as absorb substantial impacts before cracking. Read here to find out more about fiberglass crash helmets.
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