How to choose a tactical backpack
A backpack is the one piece of kit that carries everything else. If it does not fit you, you will not find out in the shop — you will find out in the fourth hour under a full load, when the straps start cutting into your shoulders and the weight settles on your lower back. So choose it not by looks, and not even by brand, but by how long and how heavy you will actually carry it.
Start with one question: how many hours in a row will it be on your shoulders. A one-shift pack, a 24-hour pack and a multi-day pack are three different objects, and they do not substitute for each other. This guide goes from your scenario to litres, fabric and carry system — the order in which the decision actually gets made.
First decision: how many litres
Litres are the number that matters most, and most people err in one direction — too big. A large pack always fills up whether it needs to or not, and a half-empty pack lets the load shift inside. Choose for your typical day, not your rarest one.
10–20 l: daily carry, the range, a single shift
This size takes a water bottle, food, first aid, ear protection and a jacket. That is enough for the range, for a duty shift or for a day in town. In the catalogue that is the Mil-Tec One Strap Assault Pack Small 10 l, the Mil-Tec 15 l MOLLE pack in 600D polyester, or the tougher M-Tac Sturm Elite Gen.II 15 l in Cordura. One step up is the M-Tac Assault Pack 20 l, measuring 42×20×25 cm.
24–36 l: 24 hours and exercises
This holds a change of clothes, a day's food, an insulating layer and water. It is the most widely used size for reservists and weekend training. The catalogue has a 24 l EDC pack in 500D Cordura with MOLLE/PALS, the M-Tac Gen.II Elite Small 25 l, a 28 l pack made from recycled materials, and at the top of this band the Mil-Tec Defense Pack Assembly 36 l and the M-Tac Large Assault Pack 36 l at 51×29×28 cm.
45–60 l: several days
This is where a real load begins — sleeping bag, mat, food for a few days. The Invader Gear Mod 3 Day 54 l states its purpose in its name, and the Texar Aldus 57 l with MOLLE covers both hiking and training. At this size the hip belt stops being optional, because without it the entire weight stays on your shoulders.
65–88 l: long routes with a frame
The largest packs are for multi-day trips, and only when you genuinely carry a lot. A 65 l Bundeswehr-style combat pack uses an aluminium stay, a 75 l trekking pack adds a frame and a rain cover, and the Recom 88 l has a full aluminium frame. A warning from practice: an 88 l pack will be packed to 88 l whether or not you need it.
You will find the full size range in small daypacks, large backpacks and hiking and trekking backpacks.
Fabric: what those numbers with a D mean
The D after a number stands for denier — the thickness of the yarn. A higher number means a thicker yarn, so more abrasion resistance, but also more weight.
600D polyester
The usual choice in budget and mid-range packs. It handles normal use, weighs little and costs less. The Mil-Tec 15 l and the 65 l pack with a PU coating are built this way. Fine if you use the pack regularly, but not daily and not through undergrowth.
500D and 1000D Cordura
Cordura is a different class of fabric — more expensive, but far better at resisting the abrasion at the base and the shoulder straps, which is where packs die first. The M-Tac Sturm Elite line uses a 500D/1000D combination, putting the tougher fabric where the wear happens. If you carry the pack several times a week, that difference pays for itself.
Water
Almost no tactical backpack is watertight. A PU coating and a dense fabric will handle rain, but in a long downpour water will find the seams and zips. Keep what matters — sleeping bag, spare clothing, electronics — packed separately. That is what dry bags and cases are for, and they cost less than one soaked night.
MOLLE: when you need it and when you do not
MOLLE webbing lets you attach pouches to the outside of the pack. That is useful when you carry kit you must reach without taking the pack off — magazine pouches, a tourniquet, a bottle.
But MOLLE has a cost: extra seams, extra weight, and an exterior that catches on branches. If the pack is for daily carry or hiking and you will not be attaching pouches, a clean surface is more comfortable and far less conspicuous. It is a choice based on use, not on which one looks more serious.
Carry system: where the weight actually lands
Up to roughly 25 l the carry system barely matters — the weight is too low. From 35 l it matters more than anything else.
Look at three things. The hip belt transfers part of the load from your shoulders onto your hips; without it a long march becomes an ordeal. The back panel needs at least some airflow, or your back will be soaked within half an hour. A frame — an aluminium stay or a full frame — only earns its weight under a heavy load; in a small pack it just adds grams.
Scenarios with real models
Reserve training and service
You want 25–36 l, MOLLE, a solid base and a hip belt. The Mil-Tec Defense Pack Assembly 36 l or the M-Tac Large Assault Pack 36 l both fit. If the load is genuinely heavy and you are out for several days, the Invader Gear Mod 3 Day 54 l.
A single day out
20–28 l covers water, food and an insulating layer. The Invader Gear Mod 1 Day Gen.II or a 28 l pack is a comfortable size when you only carry what you need before dark.
A multi-day route
From 55 l, with a proper carry system. The Texar Aldus 57 l for hiking, or — if you are carrying a sleeping bag and several days of food — a 75 l pack with a frame and rain cover.
Daily carry and EDC
15–24 l, without an obviously military look. A 24 l EDC pack in Cordura or the M-Tac Assault Pack 20 l. Here MOLLE gets in the way more than it helps.
When you need to drink on the move
If you move for long stretches without stopping, a bottle in a side pocket will not work — you will simply drink too little. That is what hydration and CamelBak systems are for: you drink through a tube without taking the pack off.
Common mistakes
- Buying too big. A pack fills to its volume, not to your need. Choose for a typical day.
- Ignoring the hip belt. Above 35 l without one, the whole load stays on your shoulders.
- Buying MOLLE "just in case". If you have no pouches and no plan for them, it is weight and snag points.
- Expecting the pack to be waterproof. It will not be. Protect the contents separately.
- Ignoring dimensions. 36 l can be narrow and tall or wide and short — read the centimetres, not just the litres.
Frequently asked questions
How many litres do I need for 24 hours?
Usually 25–36 l. That covers spare clothing, food, water and an insulating layer. If you also carry a sleeping bag, you will need 45 l or more.
Is Cordura worth the premium?
It is, if you carry the pack often or through terrain that abrades it. If you use it a few times a month and mostly in town, 600D polyester will hold up perfectly well.
Do I need a pack with a frame?
A frame makes sense from roughly 60 l and under a genuinely heavy load. In smaller packs it adds weight and returns little.
Does a tactical backpack work for daily use?
Yes, if you pick a restrained model without heavy external MOLLE. A 20–24 l EDC pack in Cordura outlasts a typical city backpack and does not read as kit.
Where to start
Start from hours and weight, not from a model. Decide how long the pack will be on your shoulders and what you will actually carry — litres, fabric and carry system follow from that on their own. Browse the full range in backpacks and bags, and if you are torn between two sizes, write to us and we will help you pick for your use.