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  • Thermally efficient zip-neck foundation piece suited to cold temperatures and slower paced activities
  • Moisture-wicking, insulated fabric offers a great warmth-to-weight ratio; plush interior has rich, warm texture
  • Flatlock construction improves next-to-skin comfort
  • Collar with zipper opens to aid rapid temperature regulation
  • Laminated sleeve pocket with laminated zip
  • Trim, next-to-body fit and elastane content increase thermal efficiency by keeping fabric in constant contact with the body


View all Arc'teryx Women's Tees and Tanks

REI membership


Best Use Mountaineering
Shirt Style Zip-front
Fabric 90% polyester/10% elastane
Moisture Wicking Yes
Quick Drying Yes
Sleeve Length Long Sleeve
Gender Women's

Size chart

Sizing notes

SHORT: Some pants are available in short sizes, which generally means an inseam that is 2 inches shorter than regular sizes. TALL: Some pants are available in tall sizes, which generally means an inseam that is 3 inches longer than regular sizes.

Rated 5 out of 5 by from girlfriend loves this base-layer I bought a medium in Calypso for her; she is a very lanky five-ten, and she weighs 140 lbs. She adores it. Got it so that she would remain warm while out on her very early 5:45 AM, frigid, bicycle rides before work. The color of the blue in real-life seems to be a little bit lighter than what the picture of the Calypso portrays. She has olive/white skin, and the blue really brightens up her face! I mean, we both love the color on her. She uses the Rho when it is super cold, and when the two Phase SV base-layers I got her (to wear under her Atom LT hoody mid-layer, and her Kappa Hoody hard-shell layer) are simply NOT warm enough. She runs very cold, body temperature-wise, but this base layer keeps her toasty. When she doesn't need to wear the Atom mid, she just wears her Rho right under her Kappa. And, she is ecstatic that "she" has finally found something that will actually keep her warm AND dry while she is out fighting the early AM wind-chill factor on her bike. And, the Rho has long enough arms that she can still lean forward to reach the handlebars of the bicycle, but yet it still hugs her pretty figure flatteringly. She really does look good in it because not only does the color compliment her face, but the sheer, body-hugging fit looks like it was tailored just for her.
Date published: 2014-05-12
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