Many new backpackers skip a pillow to save weight, then spend the night with their head on a rolled-up jacket or a lumpy stuff sack and wake up with a stiff neck. Sleep quality on a backpacking trip affects everything the next day: your energy, your mood, your balance on tricky terrain, and your willingness to keep going. A pillow that weighs less than a snack bar and packs to the size of a fist can make a real difference to all of that.

The trick is finding the type that suits how you sleep. Side sleepers need more height and support than back sleepers, stomach sleepers need something low and soft, and people who toss and turn need a pillow that stays put. The three main types below each suit different sleepers, so match the pillow to your habits rather than just picking the lightest one.

Inflatable pillows pack down tiny, weigh very little, and let you adjust firmness by adding or releasing air, which is a genuine advantage if you switch between side and back sleeping during the night. Most inflate with a few breaths and deflate flat in seconds in the morning. Their downside is feel: some sleepers find the surface slippery or bouncy, and the pillow can slide around inside a sleeping bag or on a sleeping pad.

Look for an inflatable pillow with a soft, brushed fabric top rather than bare plastic, which feels much better against skin, and a valve that is easy to adjust in the dark. Some models attach to your sleeping pad with straps or a sleeve, which solves the sliding problem neatly. If you are a side sleeper who needs height, an inflatable pillow with a raised edge or a contoured shape can keep your neck aligned better than a flat one.

A stuff sack pillow is a soft sack, sometimes with a fleece or padded lining, that you fill with spare clothing to make a pillow. Its great advantage is that it adds almost no weight or bulk, since you are already carrying the sack and the clothes. It is also endlessly adjustable: add a fleece for height, remove a layer for softness, and shape it to your head however you like.

The catch is consistency. A stuff sack pillow changes shape as you move, and if you do not have enough spare clothing, it can end up flat and lumpy. It also ties up clothes you might want for warmth at night, since the jacket inside your pillow is not on your body. Stuff sack pillows suit minimalists and warm-weather trips where spare clothing is plentiful, but picky sleepers often graduate from them to something more structured.

Foam pillows, usually made from compressible memory foam or shredded foam, feel the most like a pillow from home. They are soft, stable, do not slide around, and need no inflation or filling, which is welcome after a long day when you just want to lie down. Their weakness is pack size: even compressed, they are bulkier than inflatables, and they are heavier too, which is why weight-conscious hikers often leave them behind.

Hybrid designs try to split the difference, with a thin foam layer over an inflatable core, giving some of the comfort of foam with less bulk. These can be a good compromise for car campers transitioning to backpacking, or for shorter trips where a little extra weight is acceptable. If you struggle to sleep without a proper pillow, the extra bulk of a foam pillow is a price worth paying for a good night.

Start by thinking about how you sleep, then weigh comfort against pack space. Side sleepers who need height should look at inflatables with contoured shapes or foam hybrids. Minimalists and ultralight hikers will be happy with a stuff sack pillow on most trips. And if you know you sleep badly without a real pillow, do not punish yourself for the sake of a few grams: carry the foam pillow, sleep well, and hike better the next day. Test any pillow at home for a night or two before trusting it on a multi-day trip.