Kevlar® is an aramid fibre which is parallel laid. This lightweight, high strength, low stretch and durable material is covered in a lightweight black or white jacket which protect the fibres against UV degradation and abrasion. Kevlar 49 has one of the highest strength to weight ratios in theory. Kevlar® is typically used for Backstays, Running Backstays, Checkstays, Diagonals, Innerforestays and Babystays. Multihulls are using often Kevlar® as main shrouds.