Superthermal™ Hydrobase® is our proprietary base layer composite that combines polypropylene and polyester fibres to create a lightweight, warm and highly moisture wicking material. The fabric construction has been engineered to regulate body temperature by transferring moisture away from the skin during periods of high activity while also providing excellent thermal insulation in extremely cold conditions. The Superthermal™ Hydrobase® composite material combines hydrophilic polyester fibres and hydrophobic polypropylene fibres in a 3D knitted thermal grid. The hydrophilic polyester fibres suck moisture away from the skin and the hydrophobic polypropylene fibres filter this moisture through the fabric to the outside of the garment. The active transfer of moisture will keep the user dry even after extended periods and will also aid in regulating body temperature. Superthermal™ HydroBase® includes an antibacterial treatment to help reduce odour after extended use, and water shedding stretch woven cuffs to protect against accidental water flushing.