Shield of Sand

Whenever Gaara is about to come to harm, a shield of sand will automatically surround and protect him. The sand will react regardless of Gaara's will, even protecting him from self-inflicted injuries. The shield is capable of withstanding considerably strong attacks and projectiles, and can be hardened to a point where it's stronger than steel. It can be defeated by avoiding it completely with extremely high-speed attacks, or merely overcoming the shield with incredible brute force.

The strength of Gaara's sand was shown when it was able to block Sasuke's Amaterasu multiple times without burning in the Five Kage Summit arc.