Good running socks should have seamless toes, which ensure that the toes are very smooth, without any protrusions or threads. This can avoid discomfort caused by friction when wearing the socks for long periods of time. Because these socks are intended specifically for marathons and long-distance running, they emphasize light weight, low load, and fast feedback. The longitudinal "X" arch strap support design provides feedback, and reduces sole discomfort.