This replacement band fit my Suunto Ambit 1 reasonably well but is clearly not the same quality. Suunto makes exceptional products (those made in Finland anyway) that in my experience are superior. I was feeling cheep however so decided to try a low cost replacement for the original band that lasted almost 8 years. This band feels much stiffer than the original band, clearly made out of a different rubber/plastic/? It does work however and hopefully will last at least a few years.