Mammut Jungfrau Longsleeve
Here's what other sites are saying:
The Women's Jungfrau Top from Mammut is made from quick-drying Polartec Power Stretch Pro fabric and is an ideal baselayer for high-octane activities. With a slim fit and flatlock seams, it hugs close to your body to allow for layering but won't chafe or rub over the course of a long day. The front zip can easily be opened for some ventilation when things heat up, while the built-in UPF sun protection protects you from any ill effects.
The Mammut Jungfrau Longsleeve is a very lightweight, highly functional Polartec Power Stretch long-sleeve for all activities throughout the entire year. Also ideal for wearing next to the skin.