Icebreaker Size Chart Soft and simple underwear that offers minimalist comfort thanks to our corespun fabric, soft merino fibers wrapped around a nylon core to enhance durability while maintaining next-to-skin softness. The Siren Thong pairs perfectly with both athletic shorts during a workout, or a casual dress later that night. The forward side seams and bulk-free design make for simple, chafe-free comfort during both active and daily wear. Features: - Corespun fabric for enhanced durability - LYCRA(R) content for stretch and mobility - Low profile elastic waist and leg opening - Forward set side seams for comfort - Fit: Slim - Fabric Weight: 150 Ultralight - Fabric: 83% Merino Wool, 12% Nylon, 5% LYCRA(R) - Product Weight: Medium = 25 g / 0.88 oz