Lmao - brilliant. !
You had me at 'periscope'.
If i empty my pockets and i'm not wearing a jacket:
Frnt right: mantiss buzzard, lip salve, small multi function metal torch, mini microscope 60x magnification with both led white light and uv light, change purse with tin&bottle opener as well as money, handkerchief, at least 2 usb drives, toothpicks.
Front left: wallet, with credit card scalpel/knife, 3d printed trolley tokens and trolley keys for giveaways.
back left: 1 or 2 slings.
back right: gerber ceramic v knife sharpener, comb, lucky sea bean, glasses wipe cloth, fisher space pen,
Left side on belt: gerber plierman 600. Mp600, but with scissors and the half serrated knife blade. Best multitool on the planet !
If i've got my dogwalking jacket on you can also add: 3 inch thumb opening penknife, bottle of water, small torch plus spare battery and of course, a bag of dog biscuits
In short my jeans weigh about 7lb
To answer the question, could you survive if you were shipwrecked and only had the clothes you were wearing. I reckon i;d get by
When i was at college i was once picked up by the fuzz. The desk sergeant who processed me had to draw extra boxes on the form that listed pocket contents.