As a salute to 25 years of making Merino socks, Smartwool has combined the sock that started it all (the Hike Light Crew) with its most beloved casual sock pattern (the Margarita) to bring you the Hike Light Margarita Crew. A flat toe seam provides in-shoe comfort, while an elastic arch brace offers a secure fit.. . 60% merino wool/38% nylon/2% elastane. Sizing clearly indicated on the sock. Flat knit toe seam for additional comfort. Elastic arch brace for a secure fit. Crew height. Light cushioned sole for added warmth with minimal volume. Machine Wash Warm Gentle Cycle. Do Not Bleach. Tumble Dry Low. Do Not Iron. Do Not Dry Clean.. Made in USA of Imported Yarns.