Lanoline is the natural “grease” or “wax” that originates from the natural secretion of the sebaceous glands of sheep. Lanolin’s waterproofing property aids sheep in shedding water from their coats. Lanolin forms a breathable and protective film on the skin , and has been known since ancient times for its skin treating- and smoothing properties, which lasts for many hours. It is actually quite similar in nature to the oils produced by human skin, and is used extensively in moisturizers and other skin-care products. / Lanoline helps to keep interlocks unique moisture handling capabilities intact, will help ensure that any lingering moisture will not lead to microbe and fungal growth, and will protect the fiber from degradation over time and repeated use. Interlocks inner layers attract water, while its outer layers repel it, meaning interlock can get wet and still keep you insulated and feeling dry. / Our Lanoline Interlock fabric is Oeko Tex 100 lab