Lululemon Define Jacket Luon Black Whether you're up for adventure or ready for downtime, our fan-favourite Define Jacket, powered by Luon™ fabric, has a feel-good fit that can do it all. cottony-soft feel, luon™ fabric Cottony soft Sweat-wicking Four-way stretch Supportive Breathable Added Lycra® fibre for stretch and shape retention features Thumbholes and Cuffins™ keep sleeves down and chills out Zippered pockets Locker loop for easy hanging Zipper garage keeps chafe in check Elastic zipper pull doubles as an emergency hair tie