Pull on the Icebreaker Women's Siren Tank Top when you want to stay cool on Indian-summer days, relax in the backyard hammock, or work on your slackline skills. Made with lightweight, breathable merino wool fabric that naturally resists odor buildup, the Siren Tank feels silky-light and doesn't get stinky when you work up a sweat. Thanks to its slim fit and feminine scoop neck, the Siren Tank layers nicely beneath a sweater or flannel during chilly evenings around the campfire.