First of all, finding a 21mm strap is not easy, so kudos to Barton for offering that size! I have bought quite a few straps from Barton, and they all have offered excellent value and quality. The strap, as expected, was a bit rigid at first, but after bending it back and forth for a while and wearing it for a couple of days, has been pliable, form-fitting, and comfortable. I especially like the quick-release pins that come standard on Bartons, which, to be honest, has been a deciding factor in choosing a Barton vs. another brand that doesn't offer it.