The Icebreaker Men's Hike+ Medium Crew Sock. With strategic cushioning around the Achilles and underfoot, the exceptionally comfortable Hike Mid Crew is ideal for long-distance hikes in colder conditions. You'll love the superb temperature control and High breathability, which prevents clamminess. Features of the Icebreaker Men's Hike+ Medium Crew Sock A touch of Lycra for the perfect Fit Lightweight Naturally odor-resistant Breathable Anatomical toe box Achilles and instep support Anti-blister toe seam