1. Large Capacity: 40L (50*30*32cm/19.7*11.8*12.6 inches)/66L (60*37*39cm/23.6*14.6*15.4 inches), two sizes for your choice, fits everything from swimwear to snacks, phones, laptops, and cameras. Plenty of space for your sports gear and travel essentials. 2. Convenient Card Holder: Never lose your important cards again with the transparent card slot. Easily store your ID or other cards for quick access and identification. Keep your essentials organized and secure while on the go. 3. Night Reflective Design: Stay safe during nighttime travels with the nightreflective design of this backpack. Ensures better visibility in lowlight conditions and provides extra safety for all your outdoor activities, from sailing and fishing to camping and travel adventures. 4. Versatile Carrying Options: Transform this backpack into a crossbody bag, travel handbag, or backpack effortlessly. Whether you prefer to sling it over your shoulder, grab the handle and go, or detach the straps for a backpack style, this bag offers versatility and style for every adventure.