The Ali Baba's Wee Booties are a community-made primary weapon for the Demoman. They are a pair of steel pointed boots, curved up at the tip, that replace the Demoman's standard boots.
This item replaces the demoman's grenade launcher, giving him +25 maximum health, and 100% more turning while charging, allowing you to turn normally while charging, and steer toward your target. Another item with the same stats would be the Bootlegger.