The HH 2-layer system enables maximum moisture management while keeping you warm all season long. LIFA® 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.Fibre Content: 65% Polyester, 35% Polypropylene 49389 Helly Hansen Men's Lifa Active Long Sleeve Crew Baselayer (Black 990)