Hippodoctor Electric Heated Vest Lightweight Washable Size Adjustable USB Charging Heated Clothing (Black, L)

Not for me. I purchased an XXXL.... not even close to fitting...my son who wears a Large could barely get this vest on. The quality of construction is good. There is no instruction manual, yet it is suppose to have 5 levels of heating... push and hold button you get a red slowly flashing light, second press is solid white, next press is blue, next is solid red...I guess if you count being off as a "level of heating", then it has 5 levels of heating. I'm not sure what each light color means...I have it set to the solid red light, and it is slightly warm. If it fit, I would likely keep it, as I didn't expect much heating capability (being a 5vdc system), but the fit is just so far off...I'm a big guy, usually wear XL gear, but I can't even get this vest on.