For years, I was not much the NATO strap fan. NATO straps seemed either too thin and flimsy, or too thick and fit tight between the lugs and the springbar. The buckle and hardware were traditionally chromed steel and susceptible to rust. I also am not a fan of springbars possibly getting bent.
I came across ToxicNATOs from the wristwatch podcast, coincidentally titled The Gray Nato. ToxicNATOs according to company owner Terry Williams, are “straps with attitude.” The straps are medium weight with all stainless steel hardware. I purchased a few of them for my Explorer II 216570 and my SeaDweller 4000.
I have more images and verbiage on my no-ads, watch review website at https://www.minus4plus6.com/cool.php#toxicnatos