The Lululemon Define Nulu Jacket in Black is a stylish activewear piece perfect for yoga and other active occasions. Made from a blend of nylon and polyester with a zip closure, this jacket features long sleeves and is machine washable for easy care. The UK size 4, US size 0, ensures a comfortable fit for women looking for a versatile and high-performance garment. With its basic jacket style and insulated design, this Lululemon jacket is a practical and fashionable choice for the spring season.