USA! USA! 1" Cuff. These Channel-Air socks are designed with 5 channels of padded cushioning where you need it, and 4 channels of mesh for increased air flow. Typical padded socks have more bulk in the foot that increases heat build-up and puts undue stress on the moisture management system. This problem has been solved with the introduction of 4 channels of air-mesh eliminating needless weight and bulk. Delivers the perfect combination of Ultra-Plush Cushioning and Air-Mesh with an arch support for a cool and cushioned fit.