The Mountain Hardwear Sentinel Sling Bag comes with a slew of removable features to let you set it up just right for the needs of your day-to-day life. An additional chest strap keeps the Sentinel Sling Bag in place when youre biking down town, and a removable shoulder strap cell phone pocket ensures you never miss a call. Mountain Hardwear added a stretch mesh side pocket to keep your water bottle within easy reach. Need to bring your computer with you? No worries. This durable bag also includes a removable 17in laptop sleeve.