Hi Dick we have Able strap's on our Bell 206, I think Bell own Able and Bell approved maintenance organisations in UK fit them but are against Airwolf straps as they are not on approved list,
I have never had a problem with Airwolf they seem to have a softer outer covering and give a better ride than Able straps.
I know this does not help much, but both Able and Airwolf cost about the same I think. Tim