Hmmm.
They claim to make donations for the yellow ones and pink ones but they also have wristbands for
Beat Bullying
Breast Cancer Awareness
Breast Cancer Research
Tsunami Relief (in blue/white & pink/black)
Support our troops (in 5 different color schemes)
United We Stand
Beat Racism
Beat Poverty
God Bless America
USA - Strength
USA - Love
USA - Hope
USA - Peace
Rastafarian (inspired by Bob Marley)
Jesus Loves Me
God Bless the World
Viva Mexico!
I Heart NY
Glow in the Dark
http://www.yellowrubber.net/index.html
Me, I just made my wristband out of an old rubber glove.