Hunting, around the cabin, after skiing, on snowy walks or in town, Constrictor III offers feet maximum warmth and protection in the winter. Now in its third edition, this high performance, sporty and waterproof winter boot features a lofty and water resistant lining from Primaloft, a trusted name in insulation. It also comes with a unique Primaloft Areogel insoleoriginally developed for NASAthat insulates the foot from below, even when it is compressed. A durable Boa® Fit System is easy to use while wearing gloves and gives a supportive, customized fit. Viking's own Ultimate Grip Concept® sole delivers excellent traction on snow and slippery surfaces, while reflective details illuminate for 360º of nighttime visibility. Constrictor III is the boot of choice for comfort on the coldest days. Primaloft Insulation Aerogel Insulation Insole Boa Fit System Waterproof UGC® for Ultimate Grip Reflective Details Technical features Fit Normal Shaft Height 21.8 Shaft Width 11.4 Lining Prima