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)
The Core Bed with Base Mattress bundle is Zenbivy's simplest, softest, and most affordable complete Bed bundle. From backpacking to car camping, this setup legitimately does it all. This bundle includes everything you need for your perfect night's sleep.
Select your sizes/colors. We recommend the 10L Dry Sack & Caps for all sizes of the Core Bed 25°. Be sure to match the fitted sheet size to the mattress size (20x72, 25x72, 25x77, 30x80).
Need help with sizing? Take a look at our size guide. When in doubt: size up. Bigger is always more comfortable and just as warm.
Limit Rating: 25º F (-4°C)
Comfort Rating: 35º F (2°C)
Mattress R-value: 5
Regular-20x72: 4 lb 13 oz (2.18 kg)
Large-25x72: 5 lb 9 oz (2.52 kg)
Large-25x77: 5 lb 12 oz (2.61 kg)
XL-30x80: 6 lb 9 oz (2.98 kg)
*Regular, Large, XL refer to the quilt size. 20x72, 25x72, 25x77, 30x80 refer to the sheet/mattress size.
*Total weight includes Core Quilt, Core Sheet, Base Mattress, Quilted Pillow, 10L Dry Sack, 10L Compression Caps. Final weight rounded to the nearest ounce.
Base Mattress, Inflated Size
20x72: 20” x 72” x 1.5” (51 x 183 x 4cm)
25x72: 25" x 72" x 1.5" (63 x 183 x 4cm)
25x77: 25” x 78” x 1.5” (63 x 198 x 4cm)
30x80: 30" x 78" x 1.5" (76 x 198 x 4cm)
Base Mattress, Packed Size
20x72: 10” x 6” (25 x 15cm)
25x72: 13" x 6" (33 x 15cm)
25x77: 13” x 8” (33 x 20cm)
30x80: 15" x 8" (38 x 20cm)
Recommended Inflation Dry Sack Size
Inflated size: 15” x 10” x 4” (38 x 25 x 10cm)
Stuff size: 5” x 3” x 3” (13 x 8 x 8cm)
Core Bed 25°
Down (quilt): RDS-compliant 650 fill down
Synthetic (sheet hood): 240g 1d/3d XD Synthetic
Shell: 20d Nylon Taffeta, coating-free, 380T, cire, fluorocarbon-free DWR, 36g/m2
Liner: 50d Polyester Pongee, coating-free, 300T, cire, 62g/m2
Clips: Nifco HND5L, HND7
Top & Bottom: 75d Polyester Taffeta
Foam: Urethane foam
Inflation Dry Sack
Fabric: 30D Ripstop Nylon, 75D Polyester
Top Closure: 420D Double Side TPU, 20mm Buckle, 20mm D-Ring Release Valve
Pillowcase: 50d Polyester Pongee, coating-free, 300T, cire, 62g/m2
Synthetic: XD Polyester 160 g/M2
Bladder: Polyurethane (PU)
Materials: 30d ripstop nylon body, 75d Polyester bottom
Caps: 30D Ripstop Nylon, Polyurethane coating
Straps: 20mm Nylon Webbing
Without zippers or a complex convertible footbox, the Core Bed’s simple patent-pending Fast Footbox™ technology utilizes just one hook to quickly transform the footbox from "mummy mode" for maximum warmth to “wide mode” for maximum space.
To keep things lightweight and minimal, the Core Bed uses our proven clip system to connect the backpacking quilt to the separate fitted sheet and ensure a draft-free night of sleep.
The sheet’s roomy integrated hood insulates your head and arms and keeps your pillow in place throughout the night. Our insulated Core Sheet uses synthetic insulation, rated to 25°F.
With its legendary soft sheet-like 50d Pongee liner and a new amazingly supple and durable 30d Taffeta shell, the Core Bed features our softest fabrics yet!
The 3/4 length baffle-backed Kylie-curve™ drawstring comfortably seals in warmth around your shoulders but leaves the edges free to drape at your sides or tuck into the sheet’s hood to block drafts.
Reliably comfortable, warm, and durable, the Base Mattress achieves an all-season, ultra-warm R5 with the same premium foam core found in our Flex™ Mattress and pairs it with a durable 75D Polyester Taffeta for a no-frills mattress that delivers. It's perfect for any car camping or backpacking trip, and is a great option if you're upgrading from a closed-cell mattress or buying your first camp pad.
Snap the Inflation Dry Sack on the mattress valve for fast, breath-free manual inflation. Simply fill the bag with air and push it through.
What size Inflation Sack fits each Base Mattress?
20x72 — Medium
25x72 — Large
25x77 — Large
30x80 — XL
The 2-piece design of the Quilted Pillow makes it superior to other camp pillows. The separate pillowcase is easy to wash and provides enough space to stuff extra clothing items inside to dial-in the softness and height at which you sleep best!
The Core Bed Bundle includes a Dry Sack and Compression Caps for compact, reliable, watertight compression.
We recommend a 10L Dry Sack for all sizes of the Core Bed 25°. You can expect it to compress down to about half the size of the Dry Sack itself.
*Fits the quilt, sheet, and pillow. Mattress rolls and packs separately.