Gently used. Perfect for morning walks, chilly days, outdoor enthusiasts, hiking, camping, sports fans, athletes. This brand has been used by professional and amateur athletes all around the world, including top athletes in the NFL, CFL, NBA, MLB, NCAA and the PGA, LPGA and European Tours. Waterproof zippers to increase water resistance 3M Poly fill insulation to increase heat retention Upgraded rechargeable battery to increase battery life Dual head wall charger for faster charging Up to 3 hours of high heat on one charge.