Hardcore construction with materials that will keep the weather out. designed by bike Messengers who know what it's like to have to keep things dry and yet accessible and secure. this compact but very roomy incapable backpack has style for any situation but in my opinion is best for commute to work or school or as a carry-on bag on the plane. Here's a great write up of it from when it was introduced https://techcrunch.com/2009/05/27/chrome-soyuz-hardcore-gear-for-the-hardcore-nerd