Our Leggings are manufactured using ‘Loopback’ Meryl ©. This weave of fabric creates a stronger level of compression and water resistance. Fabric. Meryl - Lycra® actisytem fabric has the superior performance benefits of modern fibre technology with an exceptionally soft handle combined with the durability and robustness of nylon. Lycra® is the branded elastane from Invista (formerly DuPont) that stretches 5 times in length with full recovery to give enhanced fit and performance characteristics including four-way stretch. It is fully breathable and its moisture management performance keeps you cool and dry. Light and windproof.