http://www.shield.co.za/products/variant/911593/invisible-black-white | Sweat stains occur when sweat patches combine with anti perspirants on clothes, and are left to dry for a long time without being washed. Shield Invisible Black and White is specially designed not to leave sweat marks on clothes.

1. SWEAT STAIN
HOW TO AVOID SWEAT STAINS
WHY DO I GET SWEAT STAINS?
Sweat itself is clear, but when sweat patches get on your
clothes and dry, the salt, proteins and oils in your sweat may
leave a residue. This usually disappears with normal machine
washing.
WHAT ARE YELLOW SWEAT STAINS?
Sweat stain problems occur if the sweat patches are left to dry
and not washed for a long time, or if there’s a build-up of
antiperspirant or deodorant product mixed in. Over time, the
aluminium in the product and the salt in your sweat combine to

2. form a yellow sweat stain, making it harder to remove with
normal washing.
WHAT ARE WHITE SWEAT STAINS?
White sweat stains (or marks) on clothes can come from your
deodorant or antiperspirant product. Some products transfer
easily to your clothes and leave marks as you dress.
Other products are specially designed to leave no white sweat
marks on your clothes and to prevent the buildup of yellow
sweat stains, so you still get great protection – for you and your
favourite clothes.
HOW TO PREVENT SWEAT STAINS?
 Wear loose clothing made of natural fibres like cotton, linen and
wool. This will allow your sweat to evaporate more easily.
 Make sure your antiperspirant deodorant is dry before dressing
or use a ‘dry on application’ product like an aerosol.
 Don’t use too much product, as this can lead to build-up and
cause yellow sweat stains. One application will do the same job
as several.
 Use a biological washing powder to break down the sweat
patches and the product in the fabric.
 Don’t iron a sweat stain or sweat patch, as the heat will ‘set’ it,
making it harder to shift.
 If the sweat stains are really bad or the stain has ‘set’, soak the
armpit area of your clothes in a mixture of two parts white
vinegar and one part water before washing – this will break
down the stain. Don’t do this with delicate fabrics.

3.  Take care with delicate fabrics like silk and lace, as these may
need professional cleaning to get rid of sweat stains.
 If stains are the result of sweat patches from excessive
sweating, consider using a clinical strength antiperspirant, like
Shield Clinical Protection.