How to Pack a Backpack: Balance, Access and Fit
Nearly every guide on this subject shows the same diagram: heavy things in the middle, soft things at the bottom, small things in the lid. The diagram is right, and it's only a third of the problem. A pack has to balance, has to open in the order you need things, and has to fit the body carrying it. Get one of those wrong and the other two stop mattering.
Quick Answer
Load in four layers. Bulky, light, sleep-related items go at the bottom. Dense, heavy items go in the middle, pressed against the panel on your back. Medium-weight items fill the space around and above them. Anything you'll want without stopping goes in the lid and the hip-belt pockets. Then check two things most people skip: that you can reach your rain layer, water and snacks without unpacking, and that the hip belt sits on your hip bones so the weight rides on your pelvis and not your shoulders.
01Three Jobs a Packed Backpack Has to Do
Think of the last time a pack made you miserable. It was probably one of a few specific failures, and each has its own fix. If the pack pulls you backwards, especially on steep ground, the heavy weight is too far from your back or too high, and that's a loading problem. If you're unpacking half the bag every time it rains, frequently needed items are buried, which is an access problem. If your shoulders ache within an hour and your hips feel nothing, the load isn't transferring to your pelvis, and that's a fit problem. And if everything shifts and sways as you walk, you have loose packing and unused compression straps.
None of these is solved by buying a better pack, which is the usual instinct. They're solved by how you fill and adjust the one you own. Choosing the pack is a separate question, and our hiking backpack size guide covers volume and intended use. If you're packing for a flight instead of a trail, our guide to whether a 55 L backpack fits as a carry-on in Canada covers what airlines actually measure.
02The Loading Order
Work bottom to top, and load in the reverse of the order you'll need things. Anything only useful at camp goes in first.
- Bottom. Sleeping bag, spare insulating layers and camp clothing. Bulky, compressible, light and not needed until the day is over. This layer also absorbs shock when you set the pack down.
- Core. The dense items: food, stove and fuel, water, cookware. This layer sits against the back panel, roughly between your shoulder blades.
- Outer and upper. Tent body, poles and medium-weight items, packed around and above the core to stop it moving.
- Lid and belt pockets. Rain shell, snacks, map, headlamp, gloves, first aid. Anything you'd be annoyed to stop and dig for.
Fill gaps as you go, not at the end. Soft items pushed between hard ones stop the whole load shifting, and a pack that doesn't shift feels lighter than one that does at exactly the same weight. Once loaded, tighten the compression straps. They aren't decoration: they pull the mass in towards your spine and stop it swinging, and a loose set undoes much of the loading you just did.
03Why Position Beats Weight
The most effective thing you can do is control where the heaviest mass sits. Weight held close to your spine and near the middle of your back travels down through the frame to your hips. The same weight held away from your back, or attached to the outside, tries to rotate you backwards, and your lower back spends the day resisting it. That's why the same load feels completely different depending only on placement, and why hanging things off the outside of a pack is a bad habit however convenient the loops are. Every item strapped to the exterior sits further from your centre of gravity than anything inside.
Internal-frame packs are designed around exactly this, transferring load from a stiffened back panel into the hip belt. ARWE's large-capacity Naturehike NH19BP095 gives you room to practise getting the dense layer into the right place, and its listing is where to confirm the frame and back-panel details before you buy.
Field Note
Water is usually the densest thing you carry and the only thing that changes much during the day. Keep it in the core or in a reservoir sleeve against your back, not in a side pocket where it swings, and remember a pack balanced with three litres on board feels different with one. Our hiking hydration guide covers how much to carry in the first place.
04Packing for Access
A perfectly balanced pack you have to empty to reach anything is a badly packed pack. In practice access failures cost more comfort than balance failures, because the penalty repeats all day. Four things should be reachable without taking the pack off or opening the main compartment: your rain layer, your water, food for the next hour and your headlamp. Everything else can be buried. If you find yourself kneeling beside the trail in a shower, digging for a shell at the bottom of the main compartment, the loading order failed however well the weight was spread. Our day hike essentials guide lists what belongs in a day pack in the first place.
Pack by function, not category: everything for the evening meal in one place, everything for sleeping in another, everything for weather at the top. You open one thing instead of four, and in cold or wet conditions the number of times you open the pack is itself a cost. Keep the same items in the same pockets on every trip, so that after a few outings your hand finds the headlamp in the dark without thinking.
All of this technique compensates for weight, and removing an item beats positioning it well, every time. Before you optimise the packing, look at what's going in. Our ultralight backpacking gear range is where to start if the total keeps creeping up, and our guide on cutting pack weight covers that process. A plier-based camping multi-tool is a good example of one item covering several small jobs.
05Fit and Adjustment
You can load a pack perfectly and still carry it entirely on your shoulders. The frame only delivers weight to your hips if it's the right length for your torso and the belt is in the right place, and packing can't fix either. Adjust in order, with the pack loaded: loosen everything and lean slightly forward; position the hip belt so the padding is centred over your hip bones and tighten it firmly; tighten the shoulder straps just until they touch, without taking weight; pull the load lifters at the top of the shoulder straps to draw the pack towards you; and fasten the sternum strap last, loosely enough not to restrict breathing.
The test is simple. Slacken the shoulder straps for a moment. If the pack stays roughly where it is and your hips carry it, the fit is working. If it drops onto your shoulders, the belt is in the wrong place or the frame doesn't match your torso, and no amount of strap tightening will change that.
Torso length, not height, determines frame size. Some packs have an adjustable back system that lets you move the harness to match, which is worth having if more than one person uses the same pack. Not every listing says whether a pack has one, or what torso range it covers, so check before you buy. Our guide to how a hiking backpack should fit shows how to measure your torso and set every strap in order.
A pack isn't set once at the trailhead. The load changes as you drink and eat, and your body changes as you tire. Repack properly at the first break once you know how it rides, shift weight between hips and shoulders every hour or so, loosen the hip belt on steep climbs and retighten on descents, and retighten the compression straps as food and water are used. The first break is the important one: ten minutes in you know exactly what's digging in and what's swinging, and that's the cheapest moment of the trip to fix it.
06Frequently Asked Questions
Where exactly should the heaviest items go?
In the middle of the pack, pressed against the panel on your back, roughly level with your shoulder blades. That keeps the mass close to your centre of gravity so it travels down the frame to your hips and doesn't pull you backwards.
Why do my shoulders hurt even though I packed it properly?
Almost always because the weight isn't reaching your hips. Check that the hip belt padding sits over your hip bones and not your waist, and that it's tight. If loosening the shoulder straps makes the pack drop, the frame length or belt position is wrong, and loading can't compensate.
Is it acceptable to strap gear to the outside?
Sparingly. Anything on the outside sits further from your back, which works against your balance, and it snags on branches and gets wet. A sleeping pad or wet tent is a reasonable exception. Heavy items aren't.
A well-packed bag is one you stop thinking about after the first kilometre.
ARWE · FIELD JOURNAL
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