Here's what other sites are saying:
Mammuts breakthrough textile engineering technology Symbitech, sets new standards in baselayer performance and value. The concept behind the Symbitech technology is to match the characteristics of polyester microfiber, merino wool and the blends of the two textiles, into a smart fabric. Mammut uses this technology to create zonal environments within the garment to best adapt to the athletes demands for moisture and temperature management. Adding this level of functionality to baselayers has created a new paradigm in first layers. If you are contemplating retiring your old, smelly 80s era polypro, be prepared to be blown away by Mammuts All-Year Zip Longsleeve Long Underwear top.
- Altrec Outlet refers to the men's version
The thoughtfully designed Mammut Mens All-Year Zip Shirt gives you body-mapped wicking performance for any outdoor pursuit. Three different fabrics made from soft merino wool and polyester microfiber control moisture in any climate, and an antimicrobial finish keep the funk at bay during multi-day use.
- Backcountry.com refers to the men's version
The Mammut All Year base layer comprises three fabrics that have been specifically developed to regulate body temperature. Mammut has used body mapping to put the best fabric in the appropriate area of your body.
- CampSaver.com refers to the men's version
Created for cold weather layering, Mammut's Zip Longsleeve All-Year Shirt prevents chilling with body mapped synthetic and Merino-blend panels for moisture-wicking and temperature. Microfiber panels wick sweat, light Merino and poly regulates temp, and waffle-textured Merino wool-blend sections insulate you from the cold.
- Mountain Gear refers to the men's version