This One Piece photo contains
rifleman, green beret, special forces, and elite soldier.
There might also be
hip boot, thigh boot, battle dress, navy seal, and seal.
A theory about what could potentially be Luffy's 5th Gear. Talks about awakening (discussed by Doflamingo at the end of the Dressrosa arc), and Zoro and Sanji's unexplained abilities (nine sword style and Diamble Jambe).