Craft Active Extreme Active Extreme Fabric is made from thin, lightweight & elastic fibres that are channel-stitched with two high-tech polyester fibres. A hexa-channeled fibre against the skin enhances moisture transport, which cools the body down. On the outside, a hollow fibre offers insulation as well as transport of moisture to the next layer. Hexachannel Structured Fabric The Craft family of Hexachannel fabrics deliver a cool & fresh feeling using an advanced structured knit. The fibres are woven into a honeycomb micro-mesh configuration, producing a network of channels that lie flat against the skin. These channels actively pull moisture away from the body to the next layer or to the surrounding air, helping you stay cool & dry. The Hexachannel structure also adds good stretch characteristics to the fabric for a close, ergonomic fit.