Quick Answer
CHOOSE A BIVY BAG THAT FITS YOU COMFORTABLY, WITH ENOUGH ROOM TO MOVE AROUND AND KEEP YOUR GEAR INSIDE. IDEALLY, IT SHOULD BE LARGE ENOUGH TO SIT UP STRAIGHT AND MOVE YOUR ARMS OVER YOUR HEAD. A BIVY BAG THAT IS TOO TIGHT CAN CAUSE DISCOMFORT AND LIMIT YOUR MOVEMENT.
Determining Your Size
To choose the right size bivy bag, you need to consider your height, weight, and preferred sleeping position. As a general rule, bivy bags come in three main sizes: small, medium, and large. Small bivy bags are designed for people under 5 feet 8 inches tall and weigh less than 130 pounds. Medium bivy bags are suitable for people between 5 feet 9 inches to 6 feet 2 inches tall and weigh between 130-180 pounds. Large bivy bags are designed for people over 6 feet 2 inches tall and weigh more than 180 pounds. You should also consider the type of gear you plan to bring with you, such as a sleeping pad or a backpack. A bivy bag with a larger capacity will provide more room for your gear, but may be bulkier and heavier.
Measuring and Testing
To ensure the best fit, measure yourself and try on different bivy bags before making a purchase. Lie down in each bivy bag and move around to get a feel for the space and comfort level. Check that you can sit up straight and move your arms over your head without feeling constricted. Consider the material and construction of the bivy bag as well, as it can affect the overall comfort and durability of the product. Look for features such as breathable materials, waterproof coatings, and reinforced stitching.
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