In spite of what the claims make, the wraps won't help tighten up your skin. If you do have excess skin that is not popping back after having taken off the weight slowly (and your youth), then you may have to consider cosmetic surgery.
You might want to read some of member INDYGIRLs blogs. at her highest weight, she was 460+ pounds. In two years, she's lost half that weight. She made a decision to have some of her excess removed. So, reading her blogs might give you some insight. www.sparkpeople.com/mypage.asp?ID=~INDYGIR
I didn't lose as much weight as you, but I do have some sagging skin on my tummy. I strength train regularly. I eat right (most of the time) and watch my portions. I still have sagging skin. Maybe some day I might get a tummy tuck. For now, I don't let it bother because I've decided that what I can do with my body (after weight loss) is more important than how it looks.
Here's the thing, if the excess skin is causing rashes or any other medical issue, you could talk to your doctor to see if the surgery is covered. when excess skin from weight loss causes issues, some insurance policies will cover removal.
But no, there are no over the counter products that help tighten up the skin. What they'll do is help keep the skin moist and hydrated. when it's moist, it's much more flexible than when it's dried out. Do make sure you drink plenty of water. that will help keep the skin healthy. Because your skin is a vital organ, just like your heart, lunges or brain.