I got a Fjällräven Barents Trousers for Christmas! Hell yeah! It's made of the "G-1000" material.
65% polyester, 35% cotton. G-1000 Original is the original fabric in Fjällräven’s comfortable outdoor clothing. It started as a tent fabric that proved to be too heavy for lightweight tents. Tested under conditions including everything from Arctic and sub-Arctic expeditions to coffee breaks on sharp stones in forest glades.
You should take care of this kind of material with the Greenland Wax.
Greenland Wax is the impregnation that is used for all of Fjällräven’s G-1000 products. The wax has been produced since the late 1960s by the same Swedish family business. The recipe is secret but the ingredients are simple: pure paraffin and high-quality beeswax. This makes Greenland Wax a more environmentally friendly alternative than chemical-based impregnation products.
However, I wondered if I should apply the wax continuously? Like "Wax it at least once per month." or something. Or is it more like "on the fly": "Okay, I'm going to wear it tomorrow and it may get wet. Let's apply some wax."