An ideal base layer for outdoor activities or for everyday wear - that's what you'll get with the Icebreaker Women's Siren Bra! It is super comfortable and has excellent features. Icebreaker has used an especially light merino wool blended fabric, so the material is both robust and easy to clean. The bra is also breathable, odour resistant and regulates temperature. The Icebreaker Women's Siren Bra offers ultimate comfort with its no-side-seam construction, which prevents chafing when you're wearing multiple layers and have a heavy rucksack to carry. The straps can be adjusted to fine-tune the fit! Good thinking!