Helly Hansen Lifa Active Stripe Crew Long Sleeve Base Layer - Men\'s Our best performance base layer for an unbeatable combination of lightweight warmth, moisture management, and light insulation all year round Lifa® Active is a performance base layer, delivering superior moisture management and lightweight insulation for all your outdoor activities. These Lifa® Active Stripe Crew has an advanced 2-layer construction with 100% Lifa® fiber next to skin and wicking technical fibers outside. We added bold sleeve stripes because base layers don’t need to look basic. All in all, an unbeatable combination for moisture management, lightweight warmth and all-day comfort. The Lifa® Active series performs well in all weather conditions and really helps to regulate temperature; it enables the user to feel warm and comfortable. Features: 2-layer construction Performance: Breathability 6/6 - Extremely breathable: + 20000 g/sq.m/day (Helly Tech Professional range) Durability 6/6 - Heavy-duty durable: Very good durability to physical wear and wash Weight 6/6 - Extremely lightweight Insulation 2/6 - Lined for comfort Suitable for medium/high activity levels where light weight warmth is needed. Wear it as a layering piece next to skin on cold days, or as a single layer for all year activities. Autum/Winter Hiking & Camping Trekking Mountaineering Off-Piste/Side Country Back Country/Ski Touring Resort Skiing Freeride Running in cooler climates Fiber Content: Shell: 65% Polyester, 35% Polypropylene Fit Regular - Neither slim nor oversized. Regular-fitting garments may be worn over thicker midlayers. Weight: 245 g / 8.64 oz Watch this short video to find out more about the Lifa® Base Layer Technology: Technical Features: Helly Hansen Lifa® Base Layer Technology:  Lifa® is WARM: The lightweight insulating fibres help you stay warm and comfortable. Lifa® is DRY: The mesh construction absorbs the moisture, moving it away from the skin to the surface of the fabric where it evaporates, keeping your skin sweat-free. Lifa® is COMFORTABLE: The combination of insulating fibres, moisture management and soft, lightweight fabrics allows you to stay comfortable in variable conditions. In 1970, Helly Hansen’s Lifa® revolutionized the industry with the introduction of the first technical base layers. The fabric is based on a yarn technology that moves moisture away from the skin and transports it to the surface of the fabric, where it evaporates, leaving the wearer warm, dry and comfortable. Lifa® delivers excellent moisture management and insulation and has been tested and developed with the help of professionals making their living in some of the world’s harshest environments. Lifa’s 3-step moisture management system works seamlessly to protect you in cold temperatures: Care Instructions: Wash inside out Wash with similar colours