SHIPS special order BRIEFING bags. BRIEFING: Bags. BRIEFING is attractive for its durability, which can withstand any amount of luggage. It is a military factory brand that continues to make bags using parts that comply with the U.S. military standard called Mil-Spec. We have specially ordered the "SIMPLE FLAP," a large-capacity daypack that can easily hold B4-size documents, in two colors and a relaxed specification with a soft texture called protection-free Cordura nylon for a light feel. The sides have zippers, making it easy to take things in and out of the main pocket. In addition, there are six pockets on the outside for storing mobile phones and PET bottles, and three pockets on the inside, making it highly functional.