“Adding wool to kevlar makes a lighter, stronger and cheaper bullet-proof vest.

WOOL HAS MANY PROPERTIES ideal for fashion; this natural fibre is warm, elastic fire- and static-resistant, and easy to clean. But new research has uncovered a new use: making body armour even more bullet resistant.

Scientists at the Royal Melbourne Institute of Technology school of fashion and textiles discovered that a blend of wool and kevlar, the synthetic fibre widely used in body armour, was lighter and cheaper and worked better in some conditions than kevlar alone.

http://www.australiangeographic.com.au/journal/wool-adds-strength-to-bullet-proof-vests.htm