The effect of wrapping plastic wrap should be better, and the time should not be too long, because the skin needs to breathe, and massage will be more effective. You can keep warm in winter ~ but don't use sensitive muscles, there seems to be no side effects. If it is too spicy, rub it with alcohol. Follow-up: How long will it take? Answer: How long does it take to wrap the plastic wrap? Preferably within 3 hours. I always pack it for an afternoon, because I want to lose weight so much ... If I use it every day, it should work within a week. I used to lose weight on my calves.