Icebreaker Size Chart Soft and stretchy women's bikini underwear with a modern slim fit. The Siren Bikini features Icebreaker's corespun merino wool blend and provides enough coverage with the best possible fit and shape for go-to, everyday comfort. Features: - Corespun fabric for enhanced durability - LYCRA(R) content for stretch and mobility - Low profile elastic waist and leg opening - Side seams moved forward for additional comfort - Icebreaker tonal screen print logo - Medium = 32 g / 1.12 oz - 83% Merino Wool, 12% Nylon, 5% LYCRA(R) - Model images are shown in an alternate color