neatsfoot oil, is great for waterproofing and softening hard leathers, but that isn't really what is need on a strap attached to fine clothing. The is also that fact the neatsfoot oil on fine leathers will actually make the straps more brittle faster. Save the use of the oilfor heavy working leathers, saddlery and the like, for that it's fine, but in truth it is a little "heavy duty" fro nice clothing leathers