I first learned of the coffee sock in Costa Rica where in cafes they'd bring out a little coffee sock stand with your mug underneath and a small kettle of steaming water. I loved the presentation and simplicity of my coffee brewing and dripping at the table. I bought a couple of coffee socks at the mercado for around $1.
In Chile where I operate 6 months per year I can buy coffee socks in the mercados but can't find them in stores here in the US (Fayetteville, WV). I brew my coffee daily with a coffee sock as it has less waste. For travelers the coffee sock takes up the space of a sock. I prefer it over a French Press for space reasons and less grinds.
A con of a coffee sock is that it is only good for so many cups before you have to dump the grinds. I can usually get about 4 mugs if I add a spoon or two or three to each pouring. So not great for lots of folks huddled around waiting on coffee.
I found 3 wooden handled coffee socks on Amazon for $7.99. They range from around $1 to $24. The coffee sock is a small piece of gear that is on all of my trips. You'll need something to boil water. And some way to hang your coffee sock over your mug.
Link to Wooden Handled Coffee Socks Amazon