The New ClimaSense Fiber Fusion Technology is engeineered to warm you up when you are cold and cool you down when you are hot.  

The 1.0 series is the thinnest baselayer from TerraMar.  Reccommended for mid-to-high activity intensity level in cold(ish) temps, perfect for shoulder weather, and a great piece to layer further in colder/frigid weather and still keep optimal mobility in your limbs.

Specs:

• Light-Weight
• Breathable and Quick Dry
• Comfort Waistband
• UPF 25+