Waterproof. Windproof. Lightweight. Altura Shield™ REACT fabric is a 3 layer waterproof fabric offering excellent water and wind protection using REACT™ intelligent membranes and laminates that behave in an auto climatic way, releasing excess heat and moisture, keeping you dry and comfortable during activity. REACT fabrics are designed to keep you comfortable no matter how hard you're working due to their high breathability rating. The REACT fabric used here gives you a jacket that is durable and protective for days spent on your favourite rides. Read more… To get a good fit Altura utilise stretch panels which also gives you excellent freedom of movement when flowing on sweet singletrack. There are also side vents that allow for increased airflow letting warm moist air escape and fresh cooler air to circulate - perfect for regulating body temperature.