How useful would you say wearable weights/weighted clothing is for training?

[Aleucard]

Alright, here's what I'm wanting to do. First, get a few pairs of ankle/arm weights, and wear them any time I go out. When I get to where I don't notice them anymore, I add another set. Keep going until I run out of room or I get past the safety threshold (not sure, but my half-ass guess would be around 60 pounds per leg and maybe 30 per arm?). How would you guys (especially the QPs here) rate this as a sort of "passive" endurance/strength training regimen? I think this would help immensely with preparing for rucking (someone at later versions of this could carry one of those like it's a pillow), as well as for any time you might get caught off guard (since you're accustomed to being at least a few dozen pounds heavier, you can move a lot faster than normal, and for longer). Sorry if this was touched on previously, but I haven't been able to find anything about this sort of thing. Also, if you DO think this is a good idea, can you direct me to anything you would recommend for this? Something designed to be easily wearable for extended periods would help a lot.