The Navan Softshell Ladies hybrid jacket is super lightweight & manufactured of a soft, stretchy fabric that is water repellent yet highly breathable, while the windproof fabric protects against wind & cool air, keeping the inner environment of the hybrid jacket at a comfortable temperature. Thermostatic 37.5 technology removes moisture when you're hot & retains warmth when you're cold. Highly stretchable polyester that is able to be stretched for unhindered & maximum mobility.