Dex 13, Improved Unarmed Strike.
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 flatfooted.
Attempting to deflect a ranged weapon doesn’t count as an action. Unusually massive ranged weapons and ranged attacks generated by spell effects can’t be deflected.
A monk may select Deflect Arrows as a bonus feat at 2nd level, even if she does not meet the prerequisites.