The Uni-ball Zento Flow Retreat Edition is a water-based gel pen built around one idea: writing that feels effortless from the first stroke. ZENTO ink's cushioning formula reduces friction by approximately 40% compared to conventional water-based gel pens, while pigment particles keep lines clean and precise with no bleeding or show-through. It writes smoothly on most planner and notebook papers and holds up well to water exposure once dry.
The aluminum grip barrel carries a subtle sheen inspired by natural minerals, and the spring-loaded clip moves with the pen body rather than against it. At 14 grams, it sits comfortably in hand for long writing sessions. Available in .38mm and .5mm tip sizes, the Retreat Edition works equally well for detailed journaling, daily planning, and everyday note-taking.