Nike thermafit sweatshirt. Is it used? Yep! Enough to get the 70.00 worth from what I paid? Nope! It’s in excellent condition. It’s suppose to help regulate body temperature. Once I realized my son (who had to have it) had no actual interest in wearing it; I took possession thinking it would be perf for me since I was a freeze baby. But alas, menopause had other plans for me and this thing would cook me like a roasting oven. So in the closet it has hung. And now for 20 bucks it can hang fashionably in your closet as well. What a smoking deal.