The UL-Jih Evolution is a conventionally laid out, two-seat, high-wing, single-engine ultralight, designed and built in the Czech Republic.
The wing is of trapezoidal plan, with ailerons that have external balance trim tabs and sealed nosegaps.
The fuselage becomes slender towards the tail, where the trapezoidal tailplane is set at mid-height, the elevators having a small cutout for rudder movement.
The underwing cabin seats two in side-by-side configuration, with access via glazed side doors.
[1] At least six Evolutions had been built by the time WD ceased trading in 2005[1] and 15 appeared on the mid-2010 civil registers of European countries, excluding Russia.