The Injinji LINER toe socks are perfect as a liner sock, but work great as a standalone sock too. Available in Coolmax or NuWool, suitable for any weather.
Toe Socks – Bprimal Footwear
The Injinji Liner Lightweight series feature an ultra-thin crew-length sock that can be used on its own, or as a base layer. Pair it with your choice
Liner Lightweight Crew Toesocks
Injinji Trail Midweight Mini-Crew Socks
injinji
Vibram Toe Socks, Socks with Toes, Injinji
Liner Crew
AONIJIE Women Toe Socks Coolmax Running Five Finger Crew Socks Moisture Wicking Socks for Runners (S, E#3 Pairs/Dark Grey) at Men's Clothing store
Injinji Run Lightweight Crew Coolmax Toesocks OPAL - Vibram Baltic
Injinji Toe Socks - Run Lightweight No-Show CoolMax
Run Lightweight Mini-Crew - Coolmax – The Sock Monster
YOUGLE AONIJIE Ultra-thin Athletic Toe Socks for Men and Women Coolmax Five Finger Running Crew Socks Moisture Wicking Socks (M,3Pairs/Lake Blue, Mustard Green, Wine Red) at Men's Clothing store