C-Change™
This unique patented technology is inspired by the natural opening and closing of fir cones in response to different weather conditions.  The c_change™ membrane is heat welded to the Dynatectm fabric and is active over the entire pant.  c_change™ combines high breathability and heat retention with wind and waterproof qualities to ensure that you are always comfortable.

The c_change™ membrane reacts to increases and decreases in heat and moisture, so at higher temperatures or during higher activity levels, the polymer structure of the c_change™ membrane opens up and becomes extremely heat and moisture permeable in an outward direction.  The c_change™ membrane retains its wind and waterproof qualities even as it allows body heat and moisture to exit.

At lower temperatures, or lower activity levels, the polymer structure of the membrane contracts, retaining body heat.