This light, spiked helmet is adapted for use only by an Aarakocra. It gives an AC bonus of 2 when equipped on top of your already equipped armor. During combat, you can use an action to surround yourself in a small tornado that has a radius of 10 square feet.Anyone near the vortex(15 feet from the user), must make a strength saving throw of at least 8 or be sucked into the attacking range of the user.Anyone within the vortex has disadvantage on attacks against the tornado-user. At the start of their turn, anyone inside the vortex except the user  has to make a strength saving throw and end up with at least 10 to power through the cyclone's effects. If they fail, the tornado knocks the victim prone. The whirlwind can double the user's speed(walking and flying) at the cost of an action or bonus action once during each use of the helmet. The user can cancel the tornado at any time without using an action.The speed double is canceled if you cancel the whirlwind. The cyclone(and speed double) lasts 5 minutes and recharges after a long rest. 

Made from tough but flexible leather, studded leather is reinforced with close-set rivets or spikes.