Unlike many heavy boots that trap moisture, the BYD 99 incorporates a 3-layer breathable membrane (similar to Gore-Tex but proprietary to Yakata). This allows sweat vapor to escape while preventing external water from seeping in.
– Often indicates a model number, size (e.g., EU 42? no), or a year (1999?). Or a price point (99,000 IDR?). In military boot naming, "99" sometimes refers to a 1999 pattern. boots yakata byd 99