Icebreaker Siren Padded Bra - Women's Midnight Navy Medium. The Siren's lightweight Merino Corespun fabric is naturally odour resistant and helps regulates body temperature in all weather conditions. Specifications for Icebreaker Merino 150 Siren Bra w/ Inserts - Women's: Manufacturer: Icebreaker Apparel Fit: Slim Age Group: Adults Application: Everyday Gender: Female Strap Type: Adjustable Fabric/Material: Elastane Wool Polyamide Support: Low Weight: 2.47 oz Features of Icebreaker Merino 150 Siren Bra w/ Inserts - Women's Merino Corespun - merino blend regulates body temperature in all weather conditions Flatlock seams to help reduce friction Low support Adjustable straps Removable Cups Package Contents: Icebreaker Merino 150 Siren Bra w/ Inserts - Women's Icebreaker IB104708401M: Siren Padded Bra - Women's Midnight Navy Medium