Here's a video that demonstrates how it works.
From websites:
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Pre-Wrap — Versatile and Fun Headbands for the Female Athlete in Your Life
Pre-Wrap is pre-taping foam underwrap originally designed to help protect skin from tape chafing and sticking.
The foam is velvety soft and clings to itself but doesn’t stick to other materials.
Pre-Wrap is especially popular with female soccer players due to strict limits on hair accessories — most soccer regulations forbid their use.
No need to worry about headbands that are too big or too small.
The foam isn’t sticky but stays in place!
We don’t really know the origin of using it as a hair band but the one thing we do know is that it works!
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A 30-foot-long x 2.75"-wide roll in any of the 11 colors above is $2.80.
[via Gear Diary]
