Hydro-Viper joins the G.I. Joe Classified Series, updating the elite Cobra underwater trooper with modern detailing and an accessory loadout inspired by the original character.

With no restrictions on experimentation and no lack of volunteers Dr. Mindbender and Professor Rottclaw have improved upon Cobra’s past attempts to create a squadron of amphibious commandoes able to breath both air and water. Hydro-Vipers are qualified Cobra Eels (Combat Divers) surgically altered to withstand nitrogen narcosis and other side effects of deep diving, making them elite underwater troopers. Synthetic webs are implanted between their fingers and subcutaneous fat production is stimulated by chemical injections to provide natural insulation. Despite the successful conversion process, the long-term effect of these procedures is known to be psychologically destabilizing.