The Oakley SI Core Quarter Zip is designed for all-day performance across training, work, and downtime. Built with a polyester and Lycra Spandex blend, it offers stretch mobility to support active movement. A performance fit provides a streamlined feel without restricting range of motion. The quarter-zip design features a reverse coil zipper with a garage puller for smooth operation and reduced irritation. A mock collar adds coverage and structure for versatile layering. Finished with Oakley Standard Issue branding on the left sleeve, this quarter zip balances function and comfort.