The Helly Hansen Men’s Lifa Set acts as a baselayer delivering superior moisture management. This is made of 100% LIFA fiber and hence is extremely lightweight. It provides proper insulation and also possesses wicking properties. Providing all-day comfort this 2 layer set also has flatlock seams and can be worn beneath any winter outfit before stepping out in the cold., Light weight insulation., Lifa Flow technology enables maximum moisture management., 2 layer construction with Lifa fibres inside and wicking technical fibres outside., Flat lock seams for max comfort., 130g/m2 fabric.