Packed with comfortable little extras to make every ride a joy, the breathable performance of the Active Extreme Extreme CN Base Layer from Craft. Superior Venting As well as the channel-knitted polyester that allows air in & out with ease, the Active Extreme features large vents under the arms to really let the breathability to cool. As a result, sweat & moisture is wicked away from the skin faster than ever before. No More Irritation If you’re looking for an extra layer of light insulation, but you’re fed up with chafing & painful rubbing then this represents a revolution in base layer design. Seams & stitching have been reduced to a minimum, flatlocked & designed to follow your torso as it moves as part of its ergonomic fit. As a result, you can wave goodbye to chafing over longer distances for good.