Freedom to move with RollFit XT The RollFit XT seal allows the mask to dynamically adapt as patients move during the night, keeping the seal in place, as well as reducing pressure on the bridge of the nose. The RollFit XT seal extends 93% further than the previous generation RollFit seal*. The RollFit XT seal shape has also been designed to fit a wide range of face shapes and minimise leaks into the eyes. *Internal testing comparing the range of motion of the F&P Vitera RollFit XT seal against the F&P Simplus RollFit seal. Cushion only, Vitera Mask shown for reference.