For anyone who is really active or who has had a bad experience with this type of suit I'd like to recommend an alternative - The Kutting Weight Sauna Suit, found here - http://www.boxingdepot.com/ae-ss-40.html

You have to pay a little more, but you get great quality.  

No doubt the critics are right, but only up to a point. Granted the neckline was too tight for me, so I cut the elastic. That said folks are overlooking the point of any athlete needing to make weight. True, appropriate diet and workout regime help in this regard shrinking fat cells, loosing water through regulated sweating via the sauna suit helps to remove those extra hard too loose pounds. Make weight, then rehydrate. Incidently, making weight is the responsibility of the athlete. Period.
  

Sauna suits are just good for making you lose water weight. It's not like you put these on and start dropping pounds and pounds. You will gain water weight back. these suits are no substitute for diet and exercise and they aren't a magic bullet for weight loss.   

I am a 44 year old former high school and collegiate wrestler. I purchased 2 of these sauna suits from Dick's Sporting Goods. My intent was to take off a few unwanted pounds. My workouts consisted of 3 miles of running each day, weight lifting (no squats,no deadlifts), and sit ups. Don't get me wrong. The suits are as advertised--you will sweat off the pounds. What you won't do is sweat off the pounds for very long because after 2-3 weeks the arm seams and crotch seams will split--guaranteed. This is not unique for this particular product because two other brands did the same thing. If your intent is to lose your weight quickly i.e. 1-2 weeks, then this product might hold up. Otherwise save your money. These suits are fragile, trust me. Anyone who suggests otherwise is sleeping in them not exercising.  

I use mine for cycling 5-6 days a week 40 minutes at a time. It lasted over 4 months before the crotch ripped. By one size larger so you have wiggle room.   

Only problem I had is the suit rips to easy.  

The seams in the upper thigh and crotch tore as I was pulling the pants on for the first time. Would not recommend for anybody!!!