This 80sTees.com exclusive GI Joe t-shirt features the artwork that appeared on boxes for a Viper action figure. Vipers are infantry soldiers that are considered the backbone of the Cobra Legion. They are highly motivated, superbly trained and formidably equipped. Vipers start at the bottom of the Cobra pyramid, but serving in the Cobra infantry is a small price to pay to gain access to the glittering prizes at the top.