DescriptionHighlights: How to choose the right size: it all depends on layers ! With only 1 layer under, we recommend 1 size up. If worn with 2 or more layers under it, 2 sizes up will be better. Refer to the size chart for more details This light puffer jacket has been designed for backpacking, yet offers a great design making it perfect for everyday use in cold and mild weather. Warmth: From 23°F and warmer, this puffer jacket will keep you comfortably warm and is filled with recycled polyester: easier to wash than a downjacket. Compact and light: the MT100 jacket is packable into the left hand pocket. It only weighs 11 oz in size M. Water-Resistant, not waterproof: This jacket will keep you dry for a good amount of time under light rain thanks to a water-repellent fabric.