The Thermolator 2.0 Turtleneck Top is the ideal piece for all day warmth and comfort while being out in the elements. This versatile thermal piece features an ultra-soft, midweight fabric utilizing ClimaSense Thermoregulation Technology that automatically adjusts to your body temperature. It does this by trapping air to maintain warmth when your body starts to cool down. When your aerobic activity increases and your skin temperature rises, the fabric allows moisture vapor to escape to maintain comfort. Whether skiing, mountaineering, fat biking, snowshoeing or winter running, Thermolator is functional performance at its best! The Men's Thermolator 2.0 Turtleneck Top goes perfectly with the Men's Thermolator 2.0 Pant and other pieces from the Thermolator collection. Features: Ultra-soft brushed fabric surface traps air to maintain warmth Midweight warmth (2.0) makes Thermolator extremely versatile 4-way stretch for ease of movement UPF rating 25+ Odor Control neutralizes sweat and odor Technology: Climasense fiber fusion is designed to regulate your optimal temperature Thermoregulation technology provides comfort through a wide range of temperatures UPF rated for sun protection Odor Control neutralizes sweat and odor 4-Way Stretch moves naturally with your body in all activities Fabric Composition And Care: 86% Waterless Dye Polyester, 14% Spandex Machine Wash Cold. Dark Colors Separately. Tumble Dry Low. Do not Iron/Steam or Dry Clean. No Fabric Softener or Dryer Sheets.