The Define collection you know and love—in a dress. Cottony-soft Luon fabric and an easy-on front zip make this one a natural for adventures, downtime, and everything in between. Define Long-Sleeve Dress Luon 1. The Define collection you know and love-in a dress. Cottony-soft Luon fabric and an easy-on front zip make this one a natural for adventures, downtime, and everything in between 2. Our cottony-soft Luon fabric is supportive, sweat-wicking, and four-way stretch Added Lycra® 4. Thumbholes and Cuffing 5. Zipper garage keeps chafe in check Locker loop for easy hanging 7. Elastic zipper pull doublos as an emergency hair tie Tight fit, above-the-kne length