on purchases of $34.99 or more and
Free Standard Shipping on purchases of $34.99 or more applies in the U.S. only. Free Returns in the U.S. and Canada. Large, oversized items and products delivered by special or white glove carriers are not eligible for free shipping or free returns. Free returns are not applicable to final sale/non-returnable items. As always, check the deal's Fine Print for restrictions.
I have used the BOSU ball many times in the gyms I've belonged to. Helps with balance and other stuff. One example of the other stuff: Turn it over so the "ball" is under neath. Then, holding on to the metal frame, do some push ups!