MAXPEDITION Gleneagle Messenger Bag - Durable Tactical Shoulder Bag for Men & Women - Perfect for Work, Travel, and Outdoor Adventures

This bag is very sturdy and perfect for my constant heavy loads that consist of tools and reference books. Now, just about everything fits in one bag, and the shoulder strap is comfortable! It wasn't cheap, but is was definitely worth the money for a bag that can hold so much and will likely last so long. Cheers.