Our best-selling bra with a comfortable and lightly supportive fit, the Siren Bra features our 150gm jersey corespun fabric. This fabric uses merino wool fibers wrapped around a nylon core for added strength and durability, while retaining next-to-skin softness. A touch of LYCRA® is added for active stretch. The Siren’s sleek design and no-side-seam construction is perfect for everyday comfort and easy layering. Its thin adjustable elastic straps create a barely-there feel.