Merino 150 Siren Collection: Cami & Hipkini Fit Guide
By Merino Wool Clothing | icebreaker® | Published: 2026-10-20
Category: Product Reviews
Learn how the Merino 150 Siren Cami and Hipkini fit for everyday layering. Get sizing tips and care advice for this ultra-lightweight corespun merino set.
Quick answer
The Merino 150 Siren Cami and Hipkini offer a sleek, stretchy fit thanks to corespun merino blend fabric. For most body types, order your usual size for a slim, snug layering base.
Why the Siren Collection uses corespun merino
The Siren Cami and Hipkini are made with a corespun merino wool blend. This means a nylon core is wrapped in merino fibers, giving you the softness and temperature regulation of wool with the durability and stretch of a synthetic. The result is underwear that holds its shape wash after wash without feeling fragile.
Trade-offs of ultra-lightweight merino
At 150 g/m², the Siren fabric is icebreaker's lightest weight. It breathes exceptionally well and dries quickly, making it ideal for warm weather or high-output activities. However, it is more translucent than heavier weights, so consider darker colors for situations where you want more coverage. The ultra-light fabric also requires gentle care to avoid snagging.
Siren Collection fit FAQ
- How should the Siren Cami fit?
- The Siren Cami is designed for a slim, close-to-body fit. The adjustable straps and stretch fabric allow it to conform to your shape without gaping at the armholes or neckline. If between sizes, size up for a relaxed feel or down for a snug base layer fit.
- How should the Siren Hipkini fit?
- The Hipkini sits at the natural hip, offering full coverage in the back. The corespun fabric stretches to accommodate your shape without rolling or pinching. It should feel snug but not tight, with no visible lines under leggings or thin trousers. If you experience rolling, try the Bikini style which has a lower rise and less fabric at the waist.
- Can I wear the Siren Cami as outerwear?
- Yes, the scoop neck and adjustable straps make it suitable as a standalone top under a light jacket or with high-waisted pants. However, because the 150-weight fabric is sheerer than a standard cotton cami, choose a darker color or layer it under a sheer blouse for a more modest look.
- How do I care for the Siren collection?
- Machine wash cold on a gentle cycle with like colors. Use a mild detergent without bleach or fabric softener. Do not tumble dry; lay flat to dry in the shade. Avoid hanging wet, as the weight of the water can stretch the fabric. Washing in a mesh laundry bag helps prevent snags on the delicate corespun fibers.
Product facts
- Women's Merino 150 Siren Cami: The Siren Cami features a feminine scoop neck and adjustable straps for sleek everyday layering. Adjustable straps let you customize the fit for different necklines and torso lengths, reducing strap slippage during wear.
Women's Merino 150 Siren Cami - Women's Merino 150 Siren Hipkini: The Siren Hipkini features ultra-lightweight corespun merino blend fabric that’s durable, stretchy and incredibly soft. The stretch and softness mean the Hipkini moves with you without digging in, making it comfortable for all-day wear under fitted pants or skirts.
Women's Merino 150 Siren Hipkini - Women's Merino 150 Siren Bikini: The Siren Bikini features our corespun fabric that’s incredibly soft and durable. If you prefer a lower-rise cut, the Bikini offers a similar fit to the Hipkini but with less coverage on the hips, giving you another option within the same fabric.
