How to prevent condensation on sleeping bag

How to Prevent Condensation on Sleeping Bag (Helpful Tips)

Condensate happens on the outer side of your sleeping bag for condensation. Morning dew, wet weather conditions are also a cause for that. Moisture accumulation on the sleeping bag is unavoidable sometimes. But we can prevent the condensation on sleeping bag situation to some level. 

Effect of Moistness on Sleeping Bag

Among all of the camping tools, a sleeping bag is the most common one. It will give you comfort as you are staying in your own home. The dry sleeping bag is good for staying warm in all seasons.

You can have problems like losing the ability to provide warmth if the sleeping bag gets wet. The situation is even more significant if you have a wet sleeping bag. The wet climate conditions & condensation over the sleeping bag make it wet.

What Makes Condensation?

This happens at the time when vapors in the air come close to the cold stuff. It becomes liquid for the temperature drop. In the morning, condensation is caused by the dew point & there air becomes very cool & becomes saturated with vapors that are present over there.

Vapor’s then condense into liquid at the time when they come close in contact with a cold surface for the temperature drop. Dew point is the main reason when it comes to keep the bag almost dry. 

Main Reasons of Condensation

When the night gets cold, it makes the water accumulate on the surface of your bag. You can have moisture from our breathing & sweat. In general, we exhale about a half kg of water every night.

On the other hand, sweat contributes to condensation forming over the bag’s surface.

Way to Prevent Condensation on Sleeping Bag

  • Don’t overcrowd your tent

Every tent has a capacity to handle a total number of persons. If the total number exceeds, then they create some serious consequences. More people means more heat. The heat increases the inner temperature compared to the outside one.

The difference in temperature creates condensation inside your tent. The sweat and breathing of people also increase the water content of the air inside. 

  • Always cook outside of your tent

Cooking inside of the tent is convenient. But it creates smoke and moisture. The moisture will add an extra problem that you are already in. If you are fond of having tea from time to time, then it’s bad news for you that boiling water will make the situation worse. Electric kettle will also do the same. 

  • The symmetry of a tent

A good quality tent will give you protection against condensation a little bit. If your tent is close enough so that the air doesn’t come in and no ventilation, then it could create serious trouble. Dig the corners of the tent as deep as you can. This will help to stand still during strong wind. 

  • Use synthetic Sleeping Bags to prevent Condensation

They are better for camping in wet conditions. Sleeping bags are made of feathers that have air pockets for proper insulation. When it gets wet, it absorbs moisture & gets compressed by losing its capacity to provide heat.

They are slow to dry by making them harder to control in wet conditions. They have some facilities. They are light in weight & durable than other synthetic sleeping bags.

Specially made of tightly wound plastic fibers that makes them water-repellent than down bags. Easier to dry if they get wet during it rains. They are warmer during wet conditions for their water resistancy. Cheaper but they are heavier, less durable & less warm.

  • Buy some quality clothing to protect your sleeping bag

There are some good quality clothes that won’t let you down. They give some extra protection against moisture & sweat. This won’t let your sleeping bag get wet with condensation.

In general, a bag won’t protect you from getting wet as it would block moisture & sweat from evaporating.The sleeping bag wets inside the tent for a climate change in the tent than in a hammock or under a tarp.

  • Use bags with no coating

The products that are water resistant will cause problems in the future. The bag with a water resistant membrane will make it difficult for evaporating your body sweat & moisture from breath that causes condensation from the body.

Sleeping bags with coating are good for short trips where there is no place to dry. In this way they will not have enough time to collect moisture from the environment. It will absorb sweat.

There are some bags with no coating or membrane for repelling water that will provide more warmth on longer expeditions. When you get inside the bag, the water drops will simply evaporate under the driving force of the body temperature within 20 minutes.

  • Covering a down bag with a synthetic bag

Covering with a synthetic bag will make it more effective to prevent condensation on sleeping bag. The dew point will appear on the outer side of the bag. The inner bag dries freely. The synthetic part doesn’t have to be too expensive or high-insulating. It’s a practical solution for every situation.

  • Always cover your bag

It protects us from rain & morning dew. Campers sometimes replace their tent with a bivy sack that is a solution for a backpacker who wants light packings with weather protection. Cover should be breathable. Otherwise, you will make internal condensation. Raincoats can also be used to protect from condensation.

  • Placing of the tent

Choose the right place where the damage will be minimal. Neglect the places with water deposits like lakes, rivers and ponds. Avoid hollow spots because water gathers there & the air becomes cooler.

Always pick a spot with a light breeze. Don’t completely hide behind any large rock or other structures. Pitch the tent in such a way that the main opening of the tent faces the breeze. Choose a spot where a smooth breeze passes through it.

  • Provide the right ventilation

It is important if you want to reduce condensation. Air into your tent is more humid than outside. Replace that air with less humid air that is outside the tent. Keep open air vents. Keep the tent ventilated.

  • Keep your bag outside in the morning for getting outside moisture

Hang the bag outside to dry if you are in a dry & windy area. It will prevent condensation on sleeping bag. Carry a sponge to absorb water off of the sleeping bag before storing it into the backpack if you are in an area where the weather won’t be dry.


Why is my sleeping bag wet?

The fact that your sleeping bag is wet because there was air with condensate into your tent and did it. The sweat and breathing out gas also contain moisture that will let the sleeping bag wet. Extra moisture in the air makes the situation more difficult. 

What do you do if your sleeping bag gets wet?

If the sleeping bag is wet, sponge it outside to make it dry. In the morning, keep the bag outside under the sun so that all the moisture can go away. There are some chemicals that can soak water. Use those by keeping the sleeping bag in a cover and keep it for a while until it gets dry again. 

How do you stop condensation when camping?

Provide the right ventilation. Buy some quality clothing to protect your sleeping bag. Use synthetic Sleeping Bags to prevent Condensation. Don’t overcrowd your tent. Cover it with a down bag with a synthetic bag. Don’t overcrowd your tent. Always cook outside of your tent. Keep your bag outside in the morning to get outside moisture.

Should I waterproof my sleeping bag?

Adding an extra layer of water repellent coating can affect the breathability of the bag. If the bag can’t breathe, condensation may form inside the insulation. If the humidity is high, the air droplets will make your sleeping bag wet. This will make you uncomfortable to sleep at night.

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