The sheet is sized to fit your mattress and the quilt is sized to fit you.
Locate your height on the ruler below to see which size quilt and sheet/mattress we recommend. Ideally, you'll want to fall somewhere in the middle of the range. If you find yourself in the yellow, you'll probably want to size up for the most comfortable fit. The chart below is based on the average weight for each height. Also note that if you are an "active" or "wide" sleeper (i.e. someone that moves around a lot), you may want to consider sizing up to allow yourself more space to sleep naturally.
When in doubt, size up. Unlike mummy bags, there is no thermal disadvantage to a larger size Zenbivy because it is always free to wrap snuggly around you. Bigger is always more comfortable and just as warm.
Questions? We're happy to help. Let us know your height, weight, and general sleep style and we'll help you find the right size for you.
The sheet is sized to fit your mattress, whether it's one of ours or your current mattress. Our sheets fit both rectangular and tapered mattresses. Note on 4-inch mattresses: our sheets will fit 4-inch thick mattresses with rounded sides, but they do not work on 3D vertical side wall mattresses that are 4" or greater.
DESIGN UPDATE: We are currently in the process of transitioning our fitted sheets over to an adjustable design to accommodate different mattress lengths. These sheets will be named 20", 25", and 30".
20" sheets will fit mattresses up to 20" x 72" x 3.5"
25" sheets will fit mattresses up to 26" x 78" x 3.5" (including 25x72 mattresses!)
30" sheets will fit mattresses up to 30" x 80" x 3.5"
See measurements for max shoulder/hip/foot circumference of each size Bed, along with the dimensions of just the quilt itself.
Find your Bed on the image below and match it to its recommended Dry Sack size. Don't worry, with the recommended size there will still be room to throw in your Zenbivy pillow and even a down jacket. You can expect your Bed to compress down to about half the size of its recommended Dry Sack. (Ex: 7L compresses down to 3-4L, 10L down to 5L, etc)
NOTE: For help with sheet sizing, please see the Specs + Materials tab
You don't have to choose between an ultralight pack or comfort at camp—the Light Bed gives you the best of both worlds. Our 2-piece sleeping bag combines the warmth and draft-free performance of a mummy bag with the luxurious comfort of a backpacking quilt. It's built to feel like your bed at home with a sheet below you and a quilt above so you can get a comfortable, natural night's sleep outdoors without the constriction of a mummy bag.
We've refined every aspect to save weight including using performance fabrics, high-quality down, and a unique ultra-secure hook and loop system to add versatility to the setup. We built the Light Bed for performance so you can go further outdoors in comfort.
The Light Bed 25° includes the Light Quilt 25°, Light Sheet 25°, and an extra-large mesh bag for long-term storage. (Mattress, pillow, and compression sold separately)
Zipper-less Configuration — Our Light Quilts are offered in two styles: Fast Footbox™ or Convertible Footbox. The Fast Footbox™ is our simplest, lightest, and quickest. With a single clip and minimal fuss, it easily converts from warm “mummy mode” to spacious “wide mode”. In addition to both mummy and wide modes, our Convertible Footbox also unclips to lay completely flat. The Convertible Footbox provides maximum versatility in warmer temperatures and when used with accessories.
Comfortably Light Fabrics — You'll find that most down backpacking quilt makers shed weight by using thin, clingy 10d fabrics. We found more clever ways to ditch ounces while keeping the fabric a very smooth, comfy, and durable 20d. 20d fabrics are much softer than traditional ultralight tech fabrics while being only a fraction heavier. Definitely worth it!
The Kylie-curve™ — The Kylie-curve™ is a 3/4-length baffle-backed drawstring along the top of the quilt. The shortened drawstring length cinches only the center portion, so it softly seals around your neck but leaves the edges loose to either drape at your sides or tuck up into the sheet’s hood to block drafts.
Quality Insulation — The Light Bed is filled with premium 800 fill-power HyperDRY™ down. This down uses a natural wax-based compound to make it water resistant. It is durable, fluorocarbon-free, and RDS (Responsible Down Standard) compliant.
Thermally-mapped Baffles — We designed our quilts to maximize thermal efficiency, distributing down to provide the most warmth where it’s needed. Smaller baffles minimize down-shift, vertical baffles around the upper body prevent down from sliding, and horizontal baffles on the top of the foot box keep down from shifting with foot movement.
Roomy Integrated Hood — Built for all sleep positions, the Light Sheet features a wide rectangular hood that provides extra space and restriction-free warmth around your head and arms. The hood also acts as a cubby to keep your camp pillow from wandering away in the middle of the night!
Light & Compact — Starting at just 1 lb 12 oz and compressing down to about 3-4L in size, the ultra-compact Light Bed is the best choice if you're an avid backpacker looking for comfort at the lowest possible weight and bulk.
Limit Rating: 25°F (-4°C)
Comfort Rating: 35°F (2°C)
All Light Quilts are compatible with all Light Sheets regardless of size. The quilt is sized to fit you, the sheet is sized to fit your mattress. See our full size guide for more information.
Weight (Quilt w/ Fast Footbox™)
Regular: 1 lb 4 oz (0.57 kg)
Large: 1 lb 7 oz (0.65 kg)
XL: 1 lb 11 oz (0.76 kg)
Weight (Quilt w/ Convertible Footbox)
Regular: 1 lb 5 oz (0.59 kg)
Large: 1 lb 8 oz (0.68 kg)
XL: 1 lb 12 oz (0.79 kg)
Weight (Light Sheets)
20": 8 oz (0.23 kg)
25": 9 oz (0.26 kg)
30": 10 oz (0.28 kg)
Fits on mattresses UP TO...
20": 20” x 72” x 3.5"+ (51 x 183 x 9+ cm)
25": 26” x 78” x 3.5"+ (66 x 198 x 9+ cm)
30": 30" x 80" x 3.5"+ (76 x 203 x 9+ cm)
See our size guide for specifics on sheet/mattress sizing
Flat Quilt Dimensions*
Regular: 78” x 54” (198 x 137cm)
Large: 86” x 58” (218 x 147cm)
XL: 90” x 64” (229 x 163cm)
*Only Convertible Footbox quilts go completely flat. Please note that the listed quilt dimensions are for the cut fabric. Filled, lofted quilts will be several inches smaller in both length and width.
Recommended Dry Sack Size
The 7L Dry Sack will fit all sizes of the Light Bed 25°. You can expect your Light Bed to compress down to about half the size, or 3-4L. Dry Sacks are sold separately.
Light Bed Materials
Down: 800 fill-power HyperDRY™ fluorocarbon-free water-resistant 90/10 duck down
Shell: 20d Nylon Taffeta, coating-free, 380T, cire, fluorocarbon-free DWR, 36g/m2
Clips: Nifco HND5L, HND7
The Fast Footbox™ is our simplest, lightest, and quickest. With a single clip and minimal fuss, it easily converts from warm “mummy mode” to spacious “wide mode”.
In addition to both mummy and wide modes, our Convertible Footbox also unclips to lay completely flat. The Convertible Footbox provides maximum versatility in warmer temperatures and when used with accessories.
The Light Quilt uses a series of color-coded hooks and loops to form the footbox and attach the quilt to the sheet. This not only sheds the weight of heavy zippers, but gives you more versatility in how you choose to clip it!
The Light Quilt features a 3/4-length baffle-backed drawstring on the top edge. Unlike traditional backpacking quilts that have a drawstring spanning the entire width, the shortened cord length on the Zenbivy quilt cinches only the center portion, softly sealing around your neck without shortening the overall usable width of the quilt.
No thin, clingy 10d fabrics here. We found more clever ways to ditch ounces while keeping the fabric a very smooth, comfy, and durable 20d.
The Light Quilts use top-shelf 800 fill-power HyperDRY™ down, using a natural wax-based compound to make it water resistant. It is durable, fluorocarbon-free, and RDS (Responsible Down Standard) compliant.
By clipping the Light Quilt to the hinged “wings” of the Light Sheet, it's free to get wider where and when you need it to while preventing any possible drafts from the sides as you move. Then, just as instantly, the quilt "settles" to wrap snuggly around you.
Tuck in under the sheet's large hood to keep your head warm on cold nights. It's roomy and wide enough to fit the arms of stomach sleepers as well! The integrated hood doubles as a cubby to keep your camp pillow from wandering off in the middle of the night.
The Light Sheets are made with 20d nylon taffeta. This 20d fabric is buttery-soft and smooth against your skin. It's more comfortable than sleeping directly on the mattress and, as a bonus, it helps to keep your mattress cleaner for longer!
Our sheets are designed to fit most standard size mattresses on the market—both rectangular AND tapered styles! See our full size guide for specifics on sheet/mattress sizing.
Compression Dry Sacks are sold separately. You can expect your Light Bed (quilt + sheet) to compress down to about half the size of the Dry Sack itself.
We recommend the 7L Dry Sack for all sizes of the Light Bed 25°