I've been wearing my Vibram FiveFingers all the time, and I tested a few toe socks out to see which was the most durable. Only one sock ended up winning.
1. Injinji Liner Crew
These were the thinnest of them all, and the softest to the touch. The durability was mere days. Holes developed in the heels and along the seams near the big toe on like, the third use. I didn't even get a hike in. 1/10
2. Injinji Midweight NuWool Hiking Sock
These socks are some crazy blend of polyester, nylon, and merino, and were a reasonable price. They were the thickest of the socks, and seemed exceptionally durable and wear-resistant. Then, a seam popped, again near the big toe. They did last about 2 months before failing. 4/10
3. Smartwool 100% Merino Toe Socks
These were full merino and very comfy, designed for casual wear. The material wasn't durable, so the balls of each foot, the outside edge of my foot, and the heel all thinned out slowly over time. No full holes opened up, but the socks were worn so thin, they ceased to be useful for blister protection or moisture management. This happened over about a month. 3/10
4. Smartwool PHD Toe Socks, Crew
These were great (finally!). Don't be fooled by the Smartwool name; they're 40% nylon and 60% merino. This gave them exceptional durability; I've been wearing them for months and months and they still look brand new. I've probably put at least 200 miles in each pair of running, cycling, hiking, climbing, walking, etc. I've used them alone and as liner socks. Originally, I refused to wear any of these socks outside of shoes, but these proved so durable, I routinely wear them around the house on linoleum, wood, and carpet. 10/10
So, if you're looking for toe socks for a thru-hike or your Vibrams or whatever, I reccomend the Smartwool PHD socks over all others.