[plants]

This is hilarious, I realized the exact same thing about the F-91w after wearing them for 3 or 4 years. Another alternative is the Casio F-84w, which is almost completely identical to the F-91w. It's slightly more expensive, but the default strap has small circular rather than wide ovular notches. This seems to have completely fixed the strap weakening/breaking problem. I have only had it for about a year, but it shows no signs of letting up anytime soon.