MATERIAL- 40 Liters. This Military Tactical backpack is made of Water-resistant 600D polyester. YKK Zipper. PATCH AREA- Can attach nametape and flag patches. MOLLE WEBBING- With clips and carabiners, you can add endless amounts of gear to this rucksack. 3 FRONT POCKETS- Convenient and this tactical backpack is ready to meet your needs. The bottom pocket can access to the main compartment. DURABLE & MULTIFUNCTIONAL- This molle backpack with chest straps to cope with the weight so that it’s well used as a 3 day assault pack,bug out bag,survival backpack,army backpack,trekking backpack or day pack. Suits for Hiking,Camping,Trekking,Traveling,School or daily use. It’s also a great choice for Gift!