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Zenbivy Flex Mattress Owner's Manual

Inflating your Flex™ Mattress the first time:

Because the mattress was super-deflated right after manufacturing, it will need help inflating the first time.  Inflate it using the included Inflation Dry Sack until it is very firm to fully expand the foam.  Ideally, you would let it sit like this overnight to let the foam fully expand. After that, you will notice it will self inflate normally.

Storing your Flex™ Mattress:

Note that your mattress will self inflate much more quickly if, between camping trips, you store it with the valve fully open and the mattress completely flat. We understand that most people don't have the space to store it that way though. If that's the case for you, roll it up lightly (not folded) and store it with the valve open.

To inflate:

1. Pull the valve completely out and allow the mattress at least 15 minutes to self inflate.

2. Instead of allowing it time to self inflate, you can couple the Inflation Dry Sack with the valve for faster manual inflation. Make sure the valve is inserted in "inflate" mode, with the green center button facing out (the large, circular part of the green valve will be inside the mattress). Roll the Inflation Sack from the top to squeeze the air into the mattress. Repeat until the mattress is firm, then remove the Inflation Sack from the valve. 

3. Unsnap the Inflation Dry Sack and lay on the mattress on your side, push the green valve to slowly deflate until your hip just bottoms out, so you are using the full depth of the foam.  This is a great starting position to determine how firm or soft the mattress should be to work best for you.  Note that most people tend to run the mattress too firm.  Softer is generally more comfortable even if you sleep on a firm mattress at home.  Experiment to determine what works best for you.

4. Secure the valve with the outer cap.  Note if you want to adjust the pressure after the outer cap is attached, you will need to hold the valve in place when removing the cap to avoid pulling the valve completely out.

To deflate:

1. Pull the valve completely out.

2. Loosely roll the mattress (without folding) and push out as much air as possible. Kneel on the mattress to keep the air out while you insert the "deflation" valve, the side with the large round circular part of the valve on the outside and the green button facing to the inside of the mattress.

3. Unroll the mattress and fold it in half. Tightly roll the mattress, pushing out any remaining air. Secure the valve with the outer cap.

Size Chart

Unlike mummy bags, there is no thermal disadvantage to a larger size Zenbivy Bed because it is always free to wrap snugly around you. So bigger is always more comfortable and just as warm. If you are an "active" sleeper or have a "wide" sleeping position, you may want to size up to sleep naturally. When in doubt, size up.

Size Description Fits Height Fits Weight Fits mattress
Regular-20x72 Regular Quilt + 20x72 Sheet 4’10 to 5’10” up to 175 pounds 20” x 72” up to 3” thick
Large-20x72 Large Quilt + 20x72 Sheet 5’6” to 6’6” up to 225 pounds 20” x 72” up to 3” thick
Large-25x77 Large Quilt + 25x77 Sheet 5’6” to 6’6” up to 250 pounds 25” x 77” up to 3” thick
XL-25x77* Extra-Large Quilt + 25x77 Sheet up to 6’10” up to 325 pounds 25” x 77” up to 3” thick
XL-30x80** Extra-Large Quilt + 30x80 Sheet up to 6’10” up to 350 pounds 30” x 80” up to 3” thick
Size Description Fits Height Fits Weight Fits mattress
Regular-20x72 Regular Quilt + 20x72 Sheet 4’10 to 5’10” up to 175 pounds 20” x 72” up to 3” thick
Large-20x72 Large Quilt + 20x72 Sheet 5’6” to 6’6” up to 225 pounds 20” x 72” up to 3” thick
Large-25x77 Large Quilt + 25x77 Sheet 5’6” to 6’6” up to 250 pounds 25” x 77” up to 3” thick
XL-25x77* Extra-Large Quilt + 25x77 Sheet up to 6’10” up to 325 pounds 25” x 77” up to 3” thick
XL-30x80** Extra-Large Quilt + 30x80 Sheet up to 6’10” up to 350 pounds 30” x 80” up to 3” thick
Size Description Fits Height Fits Weight Fits mattress
Regular-20x72 Regular Quilt + 20x72 Sheet 4’10 to 5’10” up to 175 pounds 20” x 72” up to 3” thick
Large-20x72 Large Quilt + 20x72 Sheet 5’6” to 6’6” up to 225 pounds 20” x 72” up to 3” thick
Large-25x77 Large Quilt + 25x77 Sheet 5’6” to 6’6” up to 250 pounds 25” x 77” up to 3” thick
XL-25x77* Extra-Large Quilt + 25x77 Sheet up to 6’10” up to 325 pounds 25” x 77” up to 3” thick
XL-30x80** Extra-Large Quilt + 30x80 Sheet up to 6’10” up to 350 pounds 30” x 80” up to 3” thick

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