Developed by Finland’s UphillSport as part of their military-inspired Tactical collection, UphillSport KLICKS M4 Active Comfort Socks are designed for long miles of walking, made with soft, natural merino wool to remain comfortable and breathable throughout every yomp. The socks are a medium thickness, but at only 56gms they won’t weigh you down unnecessarily. With merino all around the foot and cushioning in the soles, these socks are thermal grade 4 for warmth. They have crew length, elastic ribbed leg shafts and fitted heels to keep the socks comfortably in place on the feet, and use smooth toe seams to prevent persistent rubbing during walks and stop blisters in their tracks.