Icebreaker Women's Siren Underwear Merino Bikini - Black

Size Guide
Size Guide Icebreaker Women's Bottoms

Measure Yourself:

Use the chart below to determine your size. If you're between two sizes, order the smaller size for a tighter fit or the larger size for a looser fit. If your measurements for chest and waist correspond to two different sizes, order the size indicated by your chest measurement for tops and your hip measurement for pants.

How to measure yourself:

  • Waist: Place the measuring tape your natural waist, the narrowest part on your torso.
  • Hip: Place the measuring tape around the fullest point on your hips.
Waist Hip
X-Small (cm) 58-64 84-90
X-Small (in) 24-26 34-36
Small (cm) 64-70 90-96
Small (in) 26-28 36-38
Medium (cm) 70-76 96-102
Medium (in) 28-30 38-40
Large (cm) 76-82 102-107
Large (in) 30-32 40-42
X-Large (cm) 82-89 107-113
X-Large (in) 32-35 42-44


Fit Guide:

Icebreaker have three different fits - slim, regular, and relaxed - ensure that when worn together, layers move and breathe like a single garment.

  • Slim Fit - A snug, close to body fit for low bulk layering
  • Regular Fit - Neither snug nor loose - garments that are worn solo or over other layers.
  • Relaxed Fit - Loose fitting lightweight layers.

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A pair of knickers so soft, you won't even feel like you're wearing any.

The merino/nylon & core-spun lycra fabric offers next-to-skin softness, whilst providing comfortable warmth, in addition to strength and durability. The bikini design provides a modern and bulk-free fit - exactly what you want out of your underwear. These practical underpants feature forward side-seams and comfortable leg/waist openings to eliminate chafing and uncomfortable rubbing. You can wear these undies under absolutely anything - from activewear to everyday denim.

  • An ultralight 150gm blend of merino, nylon and core-spun LYCRA offers comfort, durability and a full range of motion.
  • Built from 83% merino wool, 12% nylon & 5% core-spun LYCRA.
  • Ideal for everyday use as well as yoga & studio, hiking, travel and lifestyle.
  • The merino naturally resists odour, regulates temperature & manages moisture.
  • Slim fit.
  • 32 g / 1.13 oz.