Duper
Supertype · Martin Wenzel
A four-style humanist sans by Martin Wenzel with a relaxed character and a distinctive OpenType feature that cycles through glyph triplicates to vary word rhythm.
About
Available in Regular and Bold with matching italics, Duper covers 135 languages and 1,451 glyphs. Its standout feature is a letter-loop function that processes vowels and consonants separately when cycling through three alternates per character, producing more varied and natural-looking text. The family also includes alternate forms for a, g and y, multiple number sets, fraction support and sets of arrows and ornaments.
Classification
Duper presents as a humanist sans with a relaxed, informal character. The page describes it as combining aesthetics and nonchalance, suggesting a warm, readable sans rather than a geometric or grotesque construction.