Helly Hansen Women's Lifa Active 1/2 Zip Baselayer top The HH 2-layer system enables maximum moisture management while keeping you warm all season longLIFA® ACTIVE is a performance base layer, delivering superior moisture management and lightweight insulation for all year activities. LIFA® ACTIVE is an advanced two layer construction with 100% LIFA® fibre next to skin and wicking technical fibres outside. All in all, an unbeatable combination for moisture management, lightweight warmth and all day comfort.2-layer constructionExcellent moisture management properties1/2 zip constructionLIFA® fibres interiorWicking polyester exteriorFlat lock seams