Waterproof your pack and gear
A wet sleeping bag or dead phone can turn a rainy trip miserable — or unsafe. The good news: keeping gear dry is cheap and simple once you stop trusting the pack itself. Here's the system that keeps the things that matter dry, no matter how hard it rains.
The short answer
Assume your pack will get wet inside, and protect the contents from within: line the whole pack with a waterproof bag, and seal the things that must stay dry — sleep system, spare insulation, electronics and first aid — in their own dry bags. A rain cover is a nice extra, but the liner is what actually saves your trip.
Your pack is not waterproof
Even a "waterproof" fabric leaks at the seams and zippers, and ordinary pack fabric eventually soaks through in sustained rain. Water also runs down your rain jacket and your back straight into the top of the pack. So the real strategy isn't waterproofing the pack — it's waterproofing what's inside it.
A dry interior does double duty: it keeps your warmth (dry layers and sleeping bag) and your safety kit (electronics, first aid, fire) working when the weather is at its worst — the exact moment you need them.
Pack liner vs. rain cover
These two approaches are often pitched against each other; in truth they solve different problems, and a liner is the one to trust.
- Pack liner (inside): a big waterproof bag — a purpose-made liner, a heavy-duty trash-compactor bag, or a roll-top — that lines the main compartment. Everything goes inside it and stays dry even if the pack is soaked through.
- Rain cover (outside): a fitted cover that sheds light rain and keeps the pack cleaner. Useful, but it can blow off in wind, ride up, and does nothing about water running down your back.
- Best of both: use a liner as your real defense and add a cover on top when it's really coming down.
Dry bags for the essentials
Inside the liner, a few dry bags add a second line of defense and keep things organized. You don't need many — one or two for the truly critical items is plenty for most day and weekend trips.
- Roll-top dry bags seal reliably and come in sizes from phone-pocket to sleeping-bag.
- Zip-lock freezer bags are a cheap, light way to protect a phone, maps, permits and first-aid items.
- A dedicated waterproof stuff sack for the sleeping bag is worth its tiny weight on any overnight.
What must stay dry
Not everything needs protecting — your tent body and rain shell are meant to get wet. Focus your dry bags on the gear that keeps you warm, safe and able to call for help.
- Sleep system first: a wet down sleeping bag can be dangerous; protect it above all else.
- Spare insulation: the dry warm layer you put on at camp or in an emergency is useless if it's soaked.
- Electronics, fire and first aid: phone, headlamp, power bank, lighter/matches and your first-aid kit belong in a sealed bag.
- Food: keep it dry and, in bear country, in the right storage — see our packing checklist.
Reproofing your rain gear
A rain jacket that "wets out" — soaks on the surface and feels clammy — usually isn't broken; its water-repellent finish (DWR) has worn off. You can often restore it at home.
- Wash it clean first with a technical wash (not regular detergent, which leaves a residue that attracts water). Dirt and body oils are what kill DWR.
- Reapply a DWR treatment — a wash-in or spray-on product — following the label.
- Activate it with gentle heat (a cool tumble dry or a warm iron through a cloth, per the care label), which re-bonds the finish so water beads up again.
Drying out and care
Managing moisture doesn't stop at camp. Dry your gear whenever you get the chance so damp doesn't become mildew or a cold night.
- Air the tent, sleeping bag and damp layers in any sun or breeze at breaks and before packing up.
- Never store gear wet at home — mildew ruins fabrics and down; let everything dry fully first.
- Refresh dry bags and liners between trips; a pinhole leak defeats the whole system.
Waterproofing pairs naturally with knowing how to hike in the rain and how to repair a pack in the field — together they keep a wet trip fun instead of grim.
Frequently asked questions
Are hiking backpacks waterproof?
Almost none are. Most packs use water-resistant fabric but have seams and zippers that leak, and the fabric itself "wets out" in sustained rain. Treat your pack as not waterproof and protect the contents from the inside with a liner or dry bags, rather than trusting the pack alone.
Pack liner or rain cover — which is better?
A liner inside the pack is more reliable, because it protects your gear even when the cover blows off, water runs down your back into the pack, or the fabric soaks through. A rain cover keeps the pack itself cleaner and drier and helps in light rain. Many hikers use a liner as the real defense and a cover as a bonus.
How do I keep my sleeping bag dry?
Treat a dry sleeping bag as non-negotiable, especially a down bag, which loses almost all its warmth when wet. Store it in a dedicated waterproof stuff sack or roll-top dry bag, keep it low and central in the pack inside your liner, and never strap it unprotected to the outside where it catches rain and spray.