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In engineering, the word Sigma means a "Summation" or "Answer" to the problem. We chose to name our new tandem rig Sigma, because it represents a "Summation" of everything we have learned about tandem equipment, and the people who use it, since 1984. Unlike all other tandem systems, where the drogue was simply tacked onto an existing design, the Sigma was built from the ground up, as a drogue deployed system. Contained within its design is an "answer" to every container related problem we have observed. 

 Available in 2 container sizes, Sigma and Micro Sigma.