The North Face
Men's Thermoball Traction Bootie, TNF Black/TNF White
These booties are super warm, durable and weatherproof. They’re a great change from heavy boots when you want something more lightweight but still warm.
ThermoBall
This insulation uses small round clusters of Primaloft synthetic fiber that mimic down. It does a better job of trapping heat than traditional continuous-filament synthetic insulations, and has been shown to be as warm as 600 fill goose down. It is lightweight, compressible and water repellent.
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