63% Merino Wool 34% Nylon 3% Lycra Spandex

making this the perfect summer sandal

These premium Merino socks feature a secure fit and a Virtually Seamless toe for all-day comfort

The sole 100% synthetic

Atmos 2 Size (Men's US):12.5 63% Merino Wool 34% NylonThe second generation of Topo Athletic's Atmos 2 features even more cushioning for a seriously plush and comfortable ride. The upgraded, resilient ZipFoam midsole delivers a softer, lighter, and more energetic underfoot experience. Up top, the recycled engineered mesh provides a secure, well ventilated fit. On the bottom, a new outsole design features strategic rubber zones to enhance flexibility and increase traction. Upgraded 40 x 35 mm stack height