US4 so uk 8 Brand new with tags The Lululemon Define Jacket in Nulu fabric is a stylish and functional activewear piece perfect for women who enjoy yoga or other sports activities. Made with a blend of nylon and polyester, this long-sleeved jacket features a zip closure and a versatile white colour. Machine washable and designed for spring, this basic jacket from the Lululemon Define product line is a must-have for any woman looking for a comfortable and practical outerwear option.