Plemons Double Straps
I've been using all kinds of straps since I started riding. Nylons never worked. Leather was alright, but constantly stretched and I always seemed to retighten them. The only things I trusted for a long time were Toshi's. They never broke, stretched infrequently, and were comfortable. But at $100+, I couldn't afford more than one.
In comes Plemons Double Straps. They're made from leather, made by messengers, and are $60. The leather is extremely tough. Instead of teeth to grab onto the strap, there are holes to tighten down. I'd also like to mention they are just more comfortable than Toshi's during their first months. And hella classy. I gotta mention hella classy.