I have a 'near infrared pocket sauna'. It sits in a corner, down in my basement. Use it alot, great purchase! Near Infrared light is the best light. Do some research; near vs. far. Weight loss is the biggest benefit I've noticed. (Going ketogenic & intermittent fasting are also huge.)
Dr Rhonda Patrick (Joe Rogan podcast & YouTube) is a big proponent of actual sauna use; nothing about a sauna suit. Got mine from Sauna Space. There is a wealth of information on the Sauna Space website.
I have no doubt the infrared sauna can help, but as far as a sauna suit, otherwise known as plastics in my day with cause a loss of fluids from the body that is dangerous to our health. I wrestled for a number of years and wore them during practice, on the bike, and jogging. I wrestled at 167 when that was a weight class and really was as strong as I could get at short of 200lbs. 33 pounds was cutting over 15% of my ideal body weight. I was lighter, but slower and weak. That is personal use experience.