Temperature & Intensity Baselayer Chart: When developing their Baselayer collection Craft always start out by determining in what temperature & at what intensity the garments should be used. The specific temperature range & intensity level then combine to form the basis for the continuing design & development process. As a result, Craft offer the categories with unique performance characteristics that together cover all kinds of climates & intensities. For optimal performance & comfort, Craft’s baselayer should always be worn underneath your outer layers, regardless of weather conditions. Active Classic:ACTIVE CLASSIC is Craft’s time-tested & classical underwear fabric. It is made from air-channelled polyester that expels excess heat away from the body while filament yarns transport the moisture, creating an optimal microclimate for endurance in fair & cold conditions. The channel-stitched polyester features two kinds of fibres for fantastic moisture transport & a soft touch. ACTIVE is arguably a living legend among functional underwear & one of the most trusted baselayers for optimal performance. Craft Zero: Craft Zero has established itself as a legend in functional underwear & has become the most trusted base layer system for work-outs in fair & cold climates. Air-channelled polyester expels excess heat away from the body while filament yarns transport moisture to the next layer or the surrounding air. This creates the ideal balance of insulation & ventilation for endurance racing & training scenarios.