These are pretty good all-round straps. They do the job quite well and weren't very expensive. Overall pretty good materials and construction. Used on a two-row D/G melodeon and were fine for comfort and fit.
I have fitted the new Thomann 45 Pro Accordion straps to my 1939 Dallape Italian 120 bass instrument, (still in good playing condition) and the added comfort of the straps have made playing more enjoyable. Thank you.