The most durable sock in Uphill Sport’s comprehensive range of activity-specific socks, UpHill Sport “Combat” Tactical 3-Layer L4 Socks have been the chosen footwear of the Finnish military since 2005. These versatile, multipurpose crew-length outdoor socks have a three-layer Duratech structure, incorporating merino wool, with layers able to allow skin to breathe, to transfer moisture out and to retain warmth, but without thickness, so they can be worn with closer-fitting shoes and boots. The foot section has a fitted heel, which helps the socks keep their correct placement, and a flat, seamless toe, preventing the rubbing that contributes to causing blisters. To avoid cruelty, Uphill Sport merino wool products are always mulesing free (an-increasingly controversial anti-flystrike procedure that many wool-bearing flocks are subjected to).