The Majestic ZIpfree series can be seen as the high performance series from the Mystic wetsuit collection. Unlike the Majestic 4/3 frontzip this version comes without full seam-taping on the inside. They've only added this taping on the critical parts of the wetsuit. This results in more flexibility (more performance).
The Zipfree construction saves weight and reduces water flush in comparison to a frontzip.
Polar lining and the single lined back-panel will keep you warm throughout your session. The "Aquaflush" prevents water from coming in underneath your ankles.