Defender Double Zip Workbag Brown. We took a page from the original scout’s handbook (and our archives) to build Defender, a rugged combination of waxed canvas and tumbled leather with a classic-utility vibe. Field tested for trail and pavement adventurers alike, our new double zip workbag is a dependable companion for the man on the move. Get tech smart—this workbag is large enough to hold laptops up to 15, Macbook® Pro and similar sized models.