"What Our Gearhead® Experts Are Saying:""What makes these different is the zip vents: on a warm day I open them up and the airflow is immediate and significant, and on a cooler or wetter day they zip closed and the DWR shell does its job.""Conditions change mid-run more often than forecasts admit, and the District Vision Ultralight Nylon Zippered Shorts are designed with exactly that reality in mind. Built from the same 53gsm Japanese-milled nylon trusted in the Windbreaker program, the shell is featherweight, abrasion-resistant, and treated with a non-PFC Durable Water Repellent finish that handles light rain and wind without adding stiffness or weight. A comfort liner underneath means the shorts function as a complete system, ready to go without anything extra required."