Quick Answer
Air out a bivy bag every 3 days by unzipping the door and venting the interior, allowing a cross breeze to circulate the air, and then resealing it after 30 minutes.
Unzipping and Venting
To air out a bivy bag, start by unzipping the door and any other vents to create an opening. This will allow a cross breeze to circulate the air inside the bivy bag. Open the door at an angle to create a chimney effect, drawing stale air out of the bag. Leave the vents open for 30 minutes to allow the air to circulate.
Resealing and Re-orienting
After 30 minutes of ventilation, reseal the door and vents to retain the fresh air. Consider re-orienting the bivy bag to allow for continued airflow, such as tilting it slightly to create a slope. This will help to prevent condensation from forming on the inside of the bag.
Preventing Condensation
To prevent condensation from forming inside the bivy bag, make sure to dry the interior after ventilation. Use a towel or cloth to wipe down the interior surfaces, paying attention to any areas where condensation tends to form. This will help to prevent the growth of mold and mildew, and ensure that the bivy bag remains dry and comfortable to use.
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