Military Backpack

Military backpacks, chosen by litres before anything else

A military backpack is described first by its volume, and the range here runs from compact day loads up to hundred-litre expedition sacks, including waterproof dry-bag designs and duffle-style carriers with shoulder straps. Volume decides everything downstream: the length of the back panel, whether a hip belt is fitted, how many side pouches the frame can carry. Picking a size that matches the trip is more useful than picking the pattern that photographs well.

How many litres do you actually need?

The honest answer comes from the bulkiest item going in, which for most people is the sleeping system. A summer quilt and a winter bag are not the same object at all, so it is worth checking what a sleeping bag packs down to before settling on a capacity. A day out needs room for a jacket, water and food. An overnight adds sleeping kit and a shelter. Anything longer adds fuel and spare clothing, which is where the larger sacks earn their bulk. A pack that is only half full sags and swings, so oversizing has a real cost.

What does the bergen shape change?

A bergen is a tall, narrow load-carrying sack, usually with side pouches that either zip on or clip to webbing along the flanks. Keeping the load close to the spine and high on the back is what makes weight feel lighter than it is, and the narrow profile does that better than a wide, shallow sack. The trade is access. A top-loading bergen backpack wants unpacking from the top down. A panel-loading tactical backpack opens flat instead and lets you reach the bottom without emptying it.

Which parts fail first?

• Shoulder strap anchor: the stitch box where the strap joins the body takes the whole load. Look for a box-and-cross stitch rather than a single line.
• Zips: the main compartment zip fails before the fabric does. A wide gauge tooth and a covering flap both help.
• Base fabric: the underside is dragged across gravel and thrown into car boots, so a reinforced or double base matters more than the fabric on the lid.
• Buckles: side-release buckles crack in cold weather. Common sizes are easy to replace, unusual ones are not.

Is a military backpack waterproof?

Most are water-resistant rather than sealed. The fabric may shed a shower, but the seams are sewn and the zips are not watertight, so a long day of rain will find a way in. Roll-top dry-bag designs are the exception, closing by folding the opening down on itself. For everything else, the practical approach is to line the inside with a liner or pack clothing in a smaller waterproof bag, which is also how load hauling is handled with backpacking rucksacks on multi-day routes.

How should the load be packed?

Heavy items go against the back panel and level with the shoulder blades; light and bulky items fill the bottom and the outer pockets. Weight carried low or far from the spine pulls the shoulders backwards and turns a comfortable pack into a tiring one. Tighten the hip belt first, then the shoulder straps, then the load lifters, and the belt should be carrying the greater share.