Things You'll Need
Bucket or sink
Whereas cotton fabrics are absorbent and allow the skin to breath; synthetic fabrics offer no breathing room for the skin and retain odors. Synthetic fabrics such as polyester and nylon tend to retain body odor even after washing several times. You can make your synthetic clothes smell good again by just following a few simple steps. Depending on how badly the body odor has permeated the clothing, it may take several treatments.
Put 1 gallon of water in sink or bucket.
Add 1/4 cup of baking soda to the water and stir in well.
Place affected clothing in the water and soak for 10 minutes.
Remove the clothing, and rinse well with clean water. Wring out.
Wash in your washing machine as you normally would.
Repeat steps 1 to 3 as necessary.
You can also make a paste using a teaspoon of baking soda with a 1/2 teaspoon of water and apply it to the affected area such as the armpit. Leave on for 10 minutes, rinse and wash.
Do not ingest baking soda or get the mixture in your eyes.