SureWarm® Men's 7-Zone Dual-Control Classic Pro Heated Vest

The heating system is excellent, but the size is a bit too large defeating the benefit of the heating because so much air gets under the vest. I’ve ordered a small to see if it works better. Only concern is that if it ships from China I won’t get it in time to return the medium. I’m 5’ 11” and weigh 155 pounds. Chest 38”. Waist 32”