High Warmth-to-Weight Performance
Thermore® insulation is engineered to deliver substantial thermal insulation at a remarkably low weight. Its microfibers trap air efficiently, creating thousands of tiny “thermal pockets” that retain body heat.
• Higher loft with less bulk
• Consistent insulation across the entire garment
• Better warmth relative to weight
• High fill power
FILL POWER: Traditionally associated with down, now also used for loose synthetic fillings to indicate how much volume one ounce of fill can occupy once fully expanded. In laboratory testing, the material is placed in a standard cylinder, lightly compressed, and the resulting loft (volume) is measured in cubic inches (CUIN). A higher fill power number reflects greater loft and thermal efficiency, since more air is trapped within the structure. Still, fill power alone does not determine overall warmth (other factors such as the total amount of fill, construction, and fabric design play important roles).