We kept all the features of the original Flash Jak, the genuine clear anatomically molded panels that have twice the impact strength of solid plastic, the Duralex subsurface-coated Flash cap with the floating shoulder net system and Nitrolyte padding, the pivoting shoulder system that allows the Jak to conform to your bodies shape, and we added venting, cut the weight, designed a removable padding system so you can clean the roost out from behind the padding and developed an all new Form Fit biceps pad that conforms to the shape of your arm.