I have a GI camp chair that the rothco rambler 2 is molded after- Its only function is so your butt doesnt have to touch the wet ground- not super comfortable, not hyper light, not pretty. It was survived the harshest of working conditions and the stitching has not even begun to seperate on the chair material.

cosmetically if i was interested I could "customize" it myself as the seat material could be upgraded for cordura 1000d if i really wanted to overbuild it.

Your best bet sadly isn't going to be anything truly bifl. A quality pair of shoes, properly fitted, with an aftermarket pair of insoles is your best best.

Sneakers aren't really built to last- but there are textiles that last longer. Mesh is trash, and the lightweight wicking materials wear very quickly. Leather is king imo.