Both soles are crooked, unevenly. Wasn't jumping or stomping in these either. The ankle strap is way too big.

It is horribly uncomfortable. The ankle strap is useless and my foot kept sliding down.

The pump has a voltage range of 4. Volts. Thanks to the decently long power cord running to the solar panel, i was able to install the panel in a concealed location.

It now lives in the ashes of my burn barrel!