Hi Mariela,
Personally from my experience as a qualified Beauty Therapist is that body wraps are great for a special occassion, such as a wedding, anniversary, family party, etc, as they are only beneficial for short term use.
You usually need three sessions in a week to get maximum results, in the meantime, drinking water and detoxifying foods, to flush out the system.
Basically the active ingredients in the products used in the body wrap treatment, are there to make you pee more and tone the skin, so you lose immediate inches. But and there is always a but, once you go back to the normal you, the inches come back.
IMO, stick to your healthy, clean lifestyle, keep working out and if you want something to tone the skin, invest in a Professional salon product range of bodycare. This would be exfoliating the skin twice a week (which will allow maximum product absorption), and applying a 'firming' cream to the problem areas, once to twice a day.
Another good thing to do, which isn't expensive is to dry body brush the skin twice a day, using a hand held SOFT bristled body brush. You can eliminate a pound of waste in a month from dry body brushing morning and evening.
Holding the brush, use light sweeping movements in the direction of the heart, starting at the feet, work your way up to the thighs, over your butt and tummy, always in the direction of the heart, again start at the wrists and work your way up your arms, again in the direction of your heart.
It is wonderfully stimulating for the skin, makes it soft and supple, and illiminates nasty toxins from the body. Lots of people swear by it, especially good for anyone with cellulite.
It must be done on a dry skin, before a shower.
Hope this was of some help
Anna
PS: Body wraps are expensive !