Smoko Oliver Cat Footwarmer Heated Slippers -Adorable, Grumpy Cat, plush, heated slippers - New, still in unopened plastic bag -Wireless or USB heated. Charge by plugging in USB charge cord (included) into any PC, MAC, etc… Warms wirelessly for 3 to 4 hours after USB is disconnected. - One size fits most - up to women’s size 12