Needs review
Source: Player's Handbook

Description: You can deflect incoming arrows, as well as crossbow bolts, spears, and other projectile or thrown weapons.

Prerequisites: DEX 13, Improved Unarmed Strike

Required for: Grappling Block, Infinite Deflection, Reflect Arrows, Snatch Arrows

You must have at least one hand free (holding nothing) to use this feat. Once per round when you would normally be hit with a ranged weapon, you may deflect it so that you take no damage from it. You must be aware of the attack and not flat-footed. Attempting to deflect a ranged weapon doesn't count as an action. Unusually massive ranged weapons, such as boulders hurled by giants, and ranged attacks generated by spell effects, such as Melf's acid arrow, can't be deflected.