Icebreaker's most-requested bra with a top rated fit and construction that makes it even more comfortable and supportive, the Icebreaker Siren Bra Arena with Icebreaker's 'Arena' sheep print is made with 150gm jersey corespun fabric, which uses merino wool fibers wrapped around a nylon core for added strength and durability, while retaining next-to-skin softness. An added a touch of LYCRA for active stretch. The Siren's sleek design and no-side-seam construction is perfect for everyday comfort and easy layering, while its thin adjustable elastic straps make for a barely-there feel!Features:Fabric weight: 150 Ultralight Product Weight: Medium = 1.76 oz Fit: Slim Benefits: Comfort, support, breathability, durability, odor resistance Sleek design for everyday comfort and layering, adjustable straps, no side seam construction, corespun fabric for added durability Ca