Keep warm with a waistcoat that heats up to 40 ° celcius in 5 minutes Great for sports, travel, pain relief and active outdoor people Constructed using the most advanced heating wire Can be worn as an outer garment or underneath other layers Zip doubles as a handy compass Batteries are stored in two discrete pouches Requires 6 x AA batteries (sold separately) The waistcoat can be worn as an outer garment, or less…