All the features and breathing performance of the MK25 EVO/A700 plus a Black Tech coating that protects both stages from salt water and corrosion. This strong coating consists of a layer of chemical nickel (approved by FDA) with a finish of the scratch-resistant and glossy DLC (Diamond Like Carbon), so that the regulator retains its streamlined technical look even with frequent use. The second stage has a hand-crafted front cover made of 100% carbon. It is extremely shock resistant and 32 grams lighter than the standard metal cap.