The Lululemon Women's Define Jacket in black, UK size 4, is a stylish activewear jacket perfect for yoga and other spring activities. Made from a blended fabric with a nylon outer shell and polyester insulation, it features long sleeves, a zip closure, and is machine washable for easy care. The basic jacket style and sports theme make it a versatile and functional addition to any woman's wardrobe. Designed by the well-known brand Lululemon, this jacket combines quality and style for the modern woman on the go.