Danish M/45-59 Large Nylon Backpack – P37-Based Design, 13"x12"x4.5", Cold War Surplus Condtion:Very Good The four screened side vents

The four screened side vents (two each side) enhance airflow so you can stay cool

This example we have here is an original US made M1917 steel shell

Great value for hard use

The large main compartment features a zippered pouch and mesh pocket for bulky gear

Danish M/45-59 Large Nylon Backpack – P37-Based Design, 13"x12"x4.5", Cold War Surplus Condtion:Very Good The four screened side ventsThe Danish Nylon Large Pack is a high quality and durable accessory for any outdoor enthusiast. Made with the 1937 pattern web equipment design, this M45 59 pack offers ample storage space for all your gear. Perfect for camping, hiking, and other outdoor activities, it is a must have for any adventure. Measurements: 13" high x 12" wide x 4 1 2" Made in Denmark.