Name: Icebreaker Women Siren LS Sweetheart - black
Brand: Icebreaker
SKU: VF-IB1031940011
Price: 79.00 CHF
Availability: InStock

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Preview: Icebreaker Women Siren LS Sweetheart - black

Icebreaker Women Siren LS Sweetheart - black

(Product No.: VF-IB1031940011)

Mobile Preview: Icebreaker Women Siren LS Sweetheart - black

Description

A soft and stretchy women’s T-shirt for everyday comfort, the Siren Long Sleeve Sweetheart features icebreaker's corespun fabric that’s incredibly durable and soft next to your skin. Ideal for year-round use whether traveling, hiking, or relaxing after a big day outside, the Siren Long Sleeve Sweetheart also features a flattering neckline and slim fit.

Inspired by nature, icebreaker harnesses the performance qualities of natural fibers to offer an alternative to clothing based on petrochemical synthetics. Merino is an annually renewable fiber that naturally resists odors, keeps you cool when it’s hot and warm when it’s not, and lets your skin breathe for comfort all day, every day.

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Specifications

Merino Corespun - durable merino blend regulates body temperature in all weather conditions.
83% Merino Wool, 12% Nylon, 5% LYCRA®
MACHINE WASH WARM. WASH INSIDE OUT WITH LIKE COLORS. DO NOT USE SOFTENER. DO NOT BLEACH. DO NOT TUMBLE DRY. LINE DRY IN SHADE. WARM IRON. DO NOT IRON PRINT AND ACCESSORIES. DO NOT DRY CLEAN.

Heat table

Icebreaker Size Chart

This chart is tailored to the current Icebreaker assortment at Fit-und-Warm: base layers, tops, pants/leggings, gloves, socks and headwear for women, men and children.

Men – Tops

Size	Chest (cm)	Arm length (cm)
XS	84–89	85–85.75
S	89–94	85.75–86
M	94–102	86–86.5
L	102–110	86.5–87
XL	110–118	87–87.75
XXL	118–126	87.75–88.75
XXXL	126–134	88.75–89.75

Men – Bottoms / Leggings / Pants

Size	Waist (cm)	Hip (cm)
XS	70–75	83–88
S	75–80	88–93
M	80–86	93–99
L	86–94	99–105.5
XL	94–102	105.5–112
XXL	102–110	112–118.5
XXXL	110–118	118.5–125

Women – Tops and Bottoms

Size	Bust (cm)	Waist (cm)	Hip (cm)
XXS	70–76	56–61	79–84
XS	76–82	61–66	84–90
S	82–88	66–71	90–96
M	88–94	71–77	96–102
L	94–100	77–84	102–108
XL	100–107	84–91	108–114
XXL	107–116.5	91–101	114–123

Kids

Age / size	Height (cm)	Weight (kg)
2	92	13–15
3	98	15–17
4	104	17–19
5	110	19–21
6	116	21–24
8	128	24–29
10	140	29–37
12	152	37–46
14	164	46–55

Gloves

Size	Hand length (cm)	Palm girth (cm)
XS	17	18.5
S	18	19.5
M	19	21
L	20	22.5
XL	21	23.5

Hand length: middle fingertip to the base of the palm. Palm girth: around the widest part of the hand, excluding the thumb. If between sizes, Icebreaker recommends the smaller size for a tighter fit or the larger for a looser fit.

Men's Socks

Size	EU	US	UK
S	39–41.5	7–8.5	6–7.5
M	42–44	9–10.5	8–9.5
L	44.5–46.5	11–12.5	10–11.5
XL	47–49	13–14.5	12–13.5

Women's Socks

Size	EU	US	UK
S	35–37	5.5–7	3–4.5
M	38–40	7.5–9	5–6.5
L	41–43	9.5–11	7–8.5

Headwear / Neckwear

Many Icebreaker Flexi Chutes and similar head/neck accessories are offered as One Size. For beanies or headbands with size choices, always use the product-specific Icebreaker size chart.

Fits

Fit	Meaning
Slim	Snug, close-to-body fit for low-bulk layering.
Regular	Neither snug nor loose; worn solo or over other layers.
Relaxed	Loose-fitting layers for a more relaxed feel.

Assortment check: current Fit-und-Warm Icebreaker brand page. Manufacturer sources: official Icebreaker Size Charts and current product size guides for men, women, kids and gloves on icebreaker.com. Research checked on 20 August 2026.