The Core Tee takes the lightest 75g/m2 weight version of PrimaLoft® ACTIVE, as used in the Core Vest & Hoodie, to create an incredibly warm yet light layer, either as a standalone or as part of a cold-weather layering system.

The Core can be worn next to the skin or else pulled on over a first layer as added insulation but at just 87g and with a tiny pack size, it can be carried without weight penalty when not needed.

PrimaLoft® ACTIVE has incredible air-permeability, meaning when worn alone, excess heat is easily shed, stripped away by any air movement but once covered with a shell or windproof, that heat is trapped close to the skin. This allows for easy control of temperature during varied output or changeable conditions.

PrimaLoft® ACTIVE blurs the line between wadding insulation and fabric; PrimaLoft® ACTIVE loosely weaves PrimaLoft®’s industry-leading insulating fibres through a fine polyester mesh. The resultant structure is warmer and less than half the weight of a conventional fleece product – Down like performance when dry whilst also still performing when wet.