I've been wearing these for work in IR's. Pretty cheap and decently thick yet breathable https://www.amazon.com/Timberland-Merino-Blend-Hiker-Black/dp/B00SJ21K6O/ref=sr_1_1?s=apparel&ie=UTF8&qid=1501203571&sr=1-1&nodeID=1040658&psd=1&keywords=timberland+merino+wool+socks