With about 70% of the rebounders I've tested right out of the box they smell like formaldehyde. That new car scent combined with walking into a tire store. Then I call them and they say its normal and it will fade off in a few weeks. NOTTTTT.
This smell lasts for at least 2 months and stays dormant and when it gets hot or I put it in a hot car, the smell comes back again. There are only 2 rebounders that have no off gassing or any type of chemical leaching. These do not have rubber feet or plastic frames.
If I want no smell at all, I do not want a Vinyl cover. Cheap nylon is what gives that new car scent but so many toxic people actually like that smell... Ohhhhh.. that new car smell...
Look for a Naugahyde Cover. This is the material that boxing gloves are made of. Not nylon. The protective cover on the latest Cellerciser model uses Naugahyde. The Needak uses a Nylon cover.
For the extreme chemical sensitive people, even the nylon stitching can leach a smell. The Cellerciser has no scent of all. It also uses polyester stitching around the mat to connect the springs instead of nylon that has an odor.
Rubber feet are what give that tire store smell. They use polymer for their feet material instead of rubber.
Another thing I like about the latest Cellerciser is that it's Anti-Static.
The Lymphaciser and the new Cellerciser are my top two picks for someone who is sensitive to chemical off-gassing.
Cheap Rubber Feet
Another big complaint I get is having to change the feet every year or two. Cheap feet, especially when exposed to sunlight, can dry out and rot and become cracked. Eventually, the feet can crack apart and will fall off.
Compare the top Lymphatic Rebounders
New Zealand Lymphaciser VS CELLERCISER VS JUMPSPORT