What Our Gearhead(R) Experts Are Saying: "This tank is my go-to for hot trail days or long runs. It's so light it feels like I'm wearing nothing, and it dries fast even when I'm really pushing. I love that it doesn't get clingy when I sweat and still looks clean after a few days on the trail."When temps rise and the sun's overhead, the Outdoor Research Echo Tank Top keeps us cool, dry, and comfortable from first mile to summit push. Designed for high-output activity in warm weather, this ultralight layer offers breathable performance with just enough coverage to stay protected. Made with AirVent(TM) moisture-wicking fabric and treated with Polygiene(R) odor control, the Echo Tank is perfect for long-distance travel, sweaty trail days, or anytime we need maximum ventilation and minimal weight. It's built to disappear while we move and still show up looking fresh at the end of the day.