How to Choose Base Layers

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Built with a flattering sweetheart neckline, the women's Icebreaker Siren Sweetheart long underwear crew top uses lightweight merino wool to boost comfort during any activity.
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View all Icebreaker Women's Base Layer TopsBest Use | Snowsports |
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Shirt Type | T-shirt |
Fabric | 96% merino wool/4% elastane |
Sun-Protective Fabric | Yes |
Moisture Wicking | Yes |
Quick Drying | Yes |
Underwear Weight | Lightweight |
Sleeve Length | Long Sleeve |
Gender | Women's |
2X | 3X | XS | S | M | L | XL | |
---|---|---|---|---|---|---|---|
Numerical Size | 0-2 | 4-6 | 8-10 | 12-14 | 16-18 | ||
Bust | 42 - 46 | 46 - 49.5 | 30 - 32.25 | 32.5 - 34.5 | 34.5 - 37 | 37 - 39.5 | 39.5 - 42 |
Waist | 36 - 40 | 40 - 44 | 24 - 26 | 26 - 28 | 28 - 30.5 | 30.5 - 33 | 33 - 36 |
Hip | 45 - 48.5 | 48.5 - 52 | 33 - 35.5 | 35.5 - 38 | 38 - 40 | 40 - 42.5 | 42.5 - 45 |
Measurements are stated in inches unless otherwise indicated.
CHOOSING THE RIGHT SIZE: If your body measurements are midway between two sizes, select the smaller size for a tighter fit or the larger size for a looser fit. If your body measurements result in different sizes, we recommend using your chest measurement for tops and your hip measurement for pants.