I think you have been hypnotized by those dum ass comercials into beliving that sweating will make you lose real weight. I seen one that claimed you lose belly fat by wearing their belly wrap to hold the heat around your belly like a belly blanket lol. Thats funny because Ive never seen a fat guy with abs. Real weight loss comes mostly from the kitchen but it also helps to get in the gym to do some cardio and staying active at home. The sauna suits are ment to be a band-aid. They will make you dehydrated so that you can lose that 10-15 lbs woth of water weight quick for a weigh in. So they'r great for wrestlers and mma fighters to use 2 WEEKS OUT from weigh ins to make weight for their class. If not used properly it can be dangerous (and hinder lean muscle gains). I know a guy that was using a sauna suit to lose weight and he didn't understand its use and would not listen to anything I said. He ended up having kidney stones because he was so dehydrated for too long. He used the sauna suit for 6 months straight every workout.

You will loose some water weight that way but wont help with fat loss

I dont think sweat has anything to do with fat loss.