Keep toasty as a marshmallow with an Electric USB Heated Vest Comes in 3 x UK sizes: M (38-40), L (40-42)  or XL (42-44) Under-vest that heats up and promotes body shaping and a higher metabolism Smart vest that consumes excess heat and increases blood oxygen and fluidity  Restores vitality, reduces inflamation and improves micocirculation Features a built in USB port to connect to a power supply Compatible with all USB powerbanks (not included) Can change the temperature with 3 different heat settings Perfect for the colder months. Save 73% and stay warm with an Electric USB Heated Vest for 23.99 pounds