For me, I've never gotten sore sit bones. If I have a proper bike fit and am wearing a quality brand well-fitted bib I've never had any problems. Rides have been up to 7 1/2 hours and 105 miles in length. If I have any saddle issues it is from the bibs or the bike fit, usually saddle height and fore-aft setting. Even then no problems on the sit-bones but friction issues on soft tissue.