The Queen of Country calls this core warmer 'the greatest invention known to man.' Don't brave the cold without it!

“This vest is fantastic for outdoor activities. It keeps me warm without making me sweat. The material is breathable, and the heat settings are perfect for adjusting on the fly. The vest looks ...

I felt the burn in my legs and glutes and was drenched in sweat. RELATED: I Replaced Regular Walks With 'Rucking' for 2 Weeks ...