The ultimate insulation for cold weather boots

The Range Pro Sling is constructed to be comfortable

a nearly weightless material that’s composed of more than 95% air and acts as additional thermal insulation

*OFSA comfortably fits head sizes 7 – 7 ½

the all-in-one base and lower ring create a super strong design

Kelvin Aerolite Vest - Mens COLORS:LEAD The ultimate insulation for coldKelvin Aerolite Vest Mens The best thing about synthetic insulation is that it stays warm even in extreme, wet conditions. Until now, that reliability has come at the cost of bulkier and heavier products. The Kelvin Aerolite Vest harnesses the insulating properties of trapped air to create synthetic insulation that replicates the low bulk, highly compressible characteristics of down, but with warm when wet performance. We designed this go to,