The Icebreaker Women's Siren Bra is light level support for low key days. A little yoga, a bit of couch time, hike the Woods and in town to shop. The Corespun fabric Features a nylon core for durability and merino wool on the exterior for naturally soft, temperature regulating comfort. A bit of Lycra has been blended in for stretch, so you can move easy. Features of the Icebreaker Women's Siren Bra Corespun fabric for enhanced durability Lycra content for stretch and mobility Cup insert compatible Support level: low Adjustable straps No side seams prevent chafing Icebreaker tonal screenprint logo Comfort, support, breathable, durable, odor resistant Fabric Details 83% Merino wool, 12% Nylon, 5% Lycra