Thick black leather bracers with three protruding spikes made of some type of blackened metal.  

While wearing these bracers, you gain a +2 bonus to AC if you are wearing no armor and using no shield.

When an attack misses you and the attacker is within your melee range, you may use your reaction to try and strike them with these bracers.  Treat this attack as an unarmed strike except on a hit the target takes your normal unarmed strike damage, plus 1d6 slashing damage.

Notes: Bonus: Unarmored Armor Class