The Wicked PowerBag is the perfect partner to the Wicked Socker Boppers! This 4ft tall inflatable boxing bag features variable bounce back action, just fill the bottom section up with sand or water to adjust the return speed! Just like the Wicked Socker Boppers, the PowerBag is made of super heavy duty gauge vinyl for rugged durability and has an oversized deluxe no-leak air valve for easy inflation. Sock it! Bop it! Knock it down!