The Rat Race Challenger range not only boasts an impressive appearance but also delivers exceptional performance. Handpicked by our Rat Race team during their global expeditions, this range has undergone rigorous testing in diverse environments, including chilly nights in the Namib desert, skating across frozen Mongolian lakes, snowshoeing in the Arctic Circle, and exploring the Scottish Highlands. With its super lightweight design, easy packability, and snug fit, it's an ideal companion for any adventure or a cosy evening at the pub. We've chosen Dupont Sorona as our preferred fill, known for its hydrophobic properties, quick-drying capabilities, and an outstanding warmth-to-weight ratio, making it the perfect choice for damp and cold winters in the UK.