Timbuk2 Classic Messenger Bag in size Medium. In almost like new condition. Includes the stabilizer strap, plus the velcro silencers on the front (to help keep things quiet, but they're easily stashed away if you want to use the velcro to more securely close the flap). Specs below:

• Eco Cordura is made using recycled pre- and post-consumer materials
  
• Weatherproof exterior and waterproof 70D TPU liner resist moisture
  
• Aircraft-grade 6061 aluminum tri-glide buckle adjusts strap quickly
  
• OrthoLite® foam strap pad provides lasting comfort and support
  
• Switchable shoulder strap lets you choose right- or left-handed carry
  
• Dual-side vertical-zip front pocket offers fast access to essentials
  
• Spacious interior with extra organization and dual water bottle pockets
  
• Tech storage specs: Medium: 16" laptop with internal divider pocket