'Mat' Structure - Led by Primaloft synthetic 'mat' insulation provides outstanding warmth for weight, is durable and is largely unaffected by wet conditions. Traditionally this type of insulation is not very breathable leading to clamminess during periods of high activity.
Highly Breathable - Polartec are leading the way with their 'Alpha' insulation. Weight for weight it only offers about half the insulation of synthetic mat insulations but it offers much greater breathability and will transport moisture out of the garment. A property which is ideal for keeping warm during high activity.
Loose Fill, 'Down-like' - The latest synthetic fillings mimic down by providing high levels of insulation (the equivalent of around 600 Fill Power Down), high loft and compressibility along with superior wet weather performance and is non allergenic.