The Top Must was designed to comply with the US FAR 103 Ultralight Vehicles rules as well as European regulations. It features a paraglider-style wing, single-place accommodation and a single 200NaN0 Zenoah G-25 engine in pusher configuration with a 2.9:1 ratio belt reduction drive and a 1230NaN0 diameter two-bladed wooden propeller. The fuel tank capacity is .[1]
As is the case with all paramotors, take-off and landing is accomplished by foot. Inflight steering is accomplished via handles that actuate the canopy brakes, creating roll and yaw.[1]
Reviewer Rene Coulon wrote in 2003 that the line of paramotors produced by the company were, "reliable, light, yet powerful, well balanced statically and dynamically."[1]