Our warmest weight base layer zip neck in the Phase family, ideal for cold days in the alpine, this super wicking base layer has mid level insulation to keep you warm and dry, and a zip neck allows fast venting. Hybrid mapping of PhasicTM SV in the body and PhasicTM AR in the underarm area fabrics, in addition to the flatlock construction and comfortable next to skin fit, eliminates excess bulk and rapidly transfers moisture for efficient evaporation. Engineered for superior moisture management and rapid dry times during stop and go activities, this form fitting top keeps the user drier and more comfortable. Encapsulated silver ion fibres provide durable and long lasting odour control. These snugly fitting garments are made with stretch fabrics to fit next to the skin to enhance moisture management and thermal efficiency.