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 withroundedsides, 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.
Dry Sack Sizing
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 abouthalfthe size of its recommended Dry Sack. (Ex: 7L compresses down to 3-4L, 10L down to 5L, etc)
If you're an ultralight backpacker looking for a minimal setup with no sacrifice to comfort, the Fast & Light Bed Bundle is for you. This bundle includes everything you need for your perfect night's sleep.
Select your sizes/colors. We recommend the 7L Dry Sack & Caps for all sizes of the Fast & Light Bed 40° Synthetic.
Need help with sizing? Take a look at our size guide or reach out to us for help. When in doubt, size up. Bigger is always more comfortable and just as warm.
Limit Rating: 40º F (4°C) Comfort Rating: 50º F (10°C)
Mattress R-Value: 5
Bundle Weight* Regular-20x72: 3 lb 6 oz (1.53 kg) Large-25x72: 3 lb 14 oz (1.76 kg) Large-25x77: 3 lb 15 oz (1.79 kg) XL-30x80: 4 lb 12 oz (2.15 kg)
Regular, Large, and XL refer to the quilt size. The dimensions refer to the mattress/sheet size. All Light Quilts are compatible with all Fast Sheets regardless of size. These are common size pairings.
*Total weight includes the Light Quilt 40° Synthetic, Fast Sheet, Light Mattress, Light Pillow, 7L Dry Sack, 7L Compression Caps for each size pairing. Final weight rounded to the nearest ounce.
Quilt Dimensions* Regular: 78” x 54” (198 x 137 cm) Large: 86” x 58” (218 x 147 cm) XL: 90” x 64” (229 x 163 cm)
*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.
Light Mattress, Inflated Size 20x72: 20” x 72” x 3” (51 x 183 x 8 cm) 25x72: 25" x 72" x 3" (63 x 183 x 8 cm) 25x77: 25” x 78” x 3” (63 x 198 x 8 cm) 30x80: 30" x 78" x 3" (76 x 198 x 8 cm)
Light Mattress, Packed Size 20x72: 7” x 4” (18 x 10 cm) 25x72: 9" x 4" (23 x 10 cm) 25x77: 9” x 5” (23 x 13 cm) 30x80: 10" x 5" (25 x 13 cm)
Light Pillow Inflated size: 15” x 10” x 4” (38 x 25 x 10cm) Stuff size: 3” x 3” x 1” (8 x 8 x 3cm)
The Fast & Light Bed 40° Synthetic combines our Light Quilt 40° Synthetic with an ultralight, half-length, uninsulated sheet to create a complete Bed at the lowest possible weight and bulk. Built for performance, it's a minimalist setup with no sacrifice to comfort!
*Note the images on the left show the down version of the Light Quilt.
Why the Fast & Light Bed is better than a traditional backpacking quilt
Traditional quilts typically have a strap system of sorts to keep the quilt on the mattress. They're not only constricting, but also drafty, letting cold air in at the gaps between the attachment points. The Fast Sheet solves these problems.
By attaching the quilt to the hinged "wings" of the sheet, it's free to get wider where and when you need it while preventing any side drafts as you move.
Stop chasing your pillow around all night. The uninsulated single-layer hood acts as a pocket to keep your on your mattress. On cold nights, tuck the corners of the quilt into the hood to block drafts around your neck and shoulders.
Not to mention the sleek and simple half-length Nylon Taffeta sheet weighs in at just a few ounces! Maximum benefits at minimal weight.
Light Quilt Features
Hook & Loop Attachments
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 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 either edge loose to drape at your sides or tuck up into the sheet’s hood to block drafts.
Smooth Fabrics & Soft Fill
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 Quilt 40° has a 1d/3d polyester synthetic blend insulation that’s so soft you'll swear it's down.
The Light Quilt's convertible footbox provides maximum versatility in warmer temperatures. In addition to both "mummy mode" and "wide more", the convertible footbox also unclips to lay completely flat.
The only lightweight all-season mattress that is quiet, easy to inflate, and WARM. The Light Mattress is built for undisturbed sleep with 180g of fully-baffled synthetic insulation. No crinkly chip bag sounds and no cold spots!
Long gone are the lightheaded days of blowing up your mattress by breath. The Light Mattress comes with a fully-welded Inflation Dry Sack allows for easy manual inflation in under a minute.
The 2-piece design of the Light Pillow is both lighter and more comfortable than other pillows on the market. Plus, 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 Fast & Light Bed Bundle includes a Dry Sack and Compression Caps for compact, reliable, watertight compression.
The Zenbivy Dry Sacks feature fully-welded seams for a watertight seal you can trust, instant compression through its high-speed mechanical valve, and durable yet lightweight construction. Pair it with our Compression Caps to keep it fully compressed in your pack.
*Fits the quilt, sheet, and pillow.We recommend the 7L for all sizes of the Fast & Light Bed 40° Synthetic. Mattress rolls and packs separately.
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