- DARN TOUGH. 1977 GRAY. SOBO MICRO CREW LIGHT CUSHION. GRAY. Point your compass south and navigate big adventures with the SoBo hiking sock. The low-profile micro crew is up for a challenge, with a touch of cushioning in blister-prone zone and all the climate-control perks of Merino Wool to get you thru the headiest or sweatiest of hikes. Fine Gauge Knitting - Unprecedented durability and our unique -put it on, forget it"s on- feel. Fast Action Wicking - Pulls moisture away from skin. Fast drying. All Weather Performance - Cool in the summer, warm in the winter. Naturally Antimicrobial - Repels bacteria and odor.