I.S. Athletics Review

Editor's Review: 2.6 / 5.0

What You Should Know

Click Here To See Our Highest Rated Review

I.S. Athletics claims to make a unique undergarment that slims your body and gives it a well defined shape. The Insta Slim line of garments is manufactured in the United States and is a line specially created for men only. It is available online through sites like Iamslimmer.com. There is a 30 day unconditional guarantee. Return all unused garments for a full refund, less shipping and handling charges. The garments range from $29.90 for a Tank Shirt, $39.90 for a T Shirt, and $ 19.90 for a slimming belt.

List of Ingredients

80% nylon, 20% spandex.

Product Features

I.S. Athletics have a variety of undergarments including a Tank Shirt, T Shirts and Slimming belts. Wearing them can help you look 1-3 inches slimmer instantly. All the products are made from breathable fabric: nylon and a special blend of spandex fibers that offers plenty of stretch and has instant memory. They come in a variety of sizes and in black or white colors. Wearing any of these garments hone in to men’s physique problems- They redefine your midsection, support your back and chest and create a slimmer silhouette from chest to hips. The undergarments fit under any regular garment. It is recommended that you hand wash them and use non-chlorine bleach. To allow the garment to retain its shape, line dry and avoid ironing.

See Our Featured Diet


  • Can be easily purchased online.
  • All their unopened products come with a full refund, minus shipping and handling, guarantee.
  • Their garments fit under any outfit.


  • The garments are not cheap and with shipping and handling can work out to be an expensive proposition. Also, because you need to hand wash and line dry them, it can be inconvenient to have only one garment in your wardrobe.
  • It is hard to find them in retail outlets. You may have no other choice but to order them online.


If you don’t like to go to the gym on a regular basis, or want to sport a slimmer and more defined look for a special occasion, then the I.S. Athletics garment might just be the right choice for you. Also, with a full refund offered, you can’t go wrong with this product.

GD Star Rating

Have a comment or question about I.S. Athletics?