Core Sheet
Core Sheet - Uninsulated / 25" / Forest/Green is backordered and will ship as soon as it is back in stock.
Return & Exchange Policy
Return & Exchange Policy
International Duties & Taxes
International Duties & Taxes
Size Guide
Overview
The quilt is sized to fit you. The sheet is sized to fit your mattress.
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Clip quilts and sheets are sold separately.
Sizes can be mixed & matched to create the fit that’s right for you and your mattress.
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Zip quilts and sheets are sold together.
Regular, Large, and XL refer to the quilt size. 25" or 30" refers to the sheet size.
If you are an "active" sleeper or have a "wide" sleep position, consider sizing up to accommodate your sleep style. When in doubt, size up. Unlike mummy bags, there's no thermal disadvantage to a larger size Zenbivy because the quilt is always free to wrap snuggly around you. Bigger is always more comfortable and just as warm.
Quilt Sizing
On the chart below, locate your height and overarm measurement. To get your overarm measurement, stand with your arms hanging relaxed by your sides and loosely measure around the broadest part of your chest and arms.
Sheet Sizing
Zenbivy sheets are designed to fit most standard size mattresses on the market, both rectangular and tapered styles.
Our sheets fit most standard size mattresses (rounded-edge mattresses up to 4” thick and 3D-style mattresses up to 3.5” thick.) For thicker non-Zenbivy mattresses, scroll down to view our sheet guide.
Sheet Guide for Thick 3D-Style, Non-Zenbivy Mattresses
If you have a 3D mattress that's thicker than 3.5", you may just need to size up the sheet. Below is a list of common thick 3D-style mattresses and the Zenbivy sheet size each requires, if supported.
| Mattress | Size | Dimensions | Required Zenbivy Sheet Size |
| Therm-a-Rest NeoLoft | Regular | 22" x 73" x 4.6" | 25" |
| Regular Wide | 26" x 73" x 4.6" | 30" | |
| Large | 26" x 78" x 4.6" | 30" | |
| Exped MegaMat/DeepSleep/LuxeMat | Medium Wide | 25.6" x 72" x 4" | 30" |
| Long Wide | 25.6" x 77.6" x 4" | 30" | |
| Long Xtra Wide | 30.3" x 77.6" x 4" | Not supported | |
| Exped MegaMat Max | Medium Wide | 25.6" x 72" x 6" | Not supported |
| Long Wide | 25.6" x 77.6" x 6" | Not supported | |
| Long Xtra Wide | 30.3" x 77.6" x 6" | Not supported |
Quilt Dimensions
Backpacking quilts are measured by the cut-fabric dimensions. Filled and lofted quilts will be shorter/narrower. On average:
- 25°F quilts are approximately 2” shorter in both directions, for all sizes
- 10°F quilts are approximately 4” shorter in both directions, for all sizes
Convertible quilts are 6” longer when open/flat.
Circumference
The maximum circumference around your shoulders/hips/feet for each size combination when the quilt is attached to the sheet.
Dry Sack Sizing
Both the quilt and sheet will fit in the recommended Dry Sack size and there will still be room to throw in your Zenbivy SoftTop™ Pillow or a down jacket.
You can expect your bed to compress down to about half the original size of the Dry Sack. Example: 7L compresses down to 3-4L, 10L down to 5L, etc
Description
Description
The Zenbivy Core Sheet pairs perfectly with the Core Quilt to block drafts and eliminate constriction, featuring a DWR-free 50D Pongee lining and lightweight 20D Nylon shell for maximum comfort at camp.
Specifications
Specifications
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Limit/Comfort
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Weight
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Compatible With
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Sheet Sizing
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Fill
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Fill Weight
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Fabric
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Includes
Reimagined Core Sheets
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Comfort-Mapped Fabrics
The new 2025 Core Sheets are comfort-mapped with 50D Pongee to add comfort where you need it and 20D Nylon to save weight where you don't.
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Simplified Sizing
We made the choice to discontinue our 20" sheet. Our 25" sheets work on narrower mattresses and we find that most people are using a mattress 25" or wider. More space, more comfort!
25" Sheets Fit Narrower Mattresses
Using a 20" mattress? Don't worry—the 25" sheet works on it too! Simply cinch the strap and the drawstring at the bottom.
Fits Most Mattresses
Zenbivy sheets are designed to fit most standard size mattresses on the market, including rectangular and tapered styles.
Why Pair Your Quilt With a Sheet?
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![Woman demonstrating how the 2-piece Zenbivy sleep system blocks all drafts, unlike its competitors which lift to let in cold air as you turn over.]()
Block Drafts
Together, the hood and wings of the sheet create a draft shield. Attaching your quilt to the draft shield keeps it "tucked" at your sides to block drafts and guides the corners of the quilt into the hood to seal in warmth around your neck and shoulders.
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![Demonstration of how the 2-piece Zenbivy sleep system eliminates constriction and keeps the quilt on the mattress.]()
Eliminate Constriction
The sides of the draft shield function as hinges, allowing the quilt to move freely, expanding and settling naturally while keeping the quilt from falling off the mattress. This unique design instantly gives you space when you need it and the ability to wrap the quilt snuggly around you when you want it.
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![Close-up of Zenbivy sheet with integrated insulated hood in light blue and navy, designed to securely hold a mattress and keep campers warm.]()
Insulate Your Head
Unlike a traditional backpacking quilt + straps combo, Zenbivy sheets feature an integrated hood to insulate your head. Sheets are available in insulated styles for full mummy bag warmth or uninsulated styles for use in warmer weather or to line with a down jacket.
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![Close-up view of Zenbivy sheet's built-in headboard clips securing a Zenbivy SoftTop™ Pillow in place on a camping mattress.]()
Clip In Your Pillow
The sheet's integrated hood acts as a built-in headboard, with loops to clip in your Zenbivy SoftTop™ Pillow to keep it from sliding off the mattress.
Core Quilt - 25°F Down / Regular / Forest/Green is backordered and will ship as soon as it is back in stock.
Complete Your Core Bed Set Up
Pair your Core Bed with a mattress, pillow, and dry sack to complete your Zenbivy sleep system.
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$85.00Unit price /Unavailable
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$48.00Unit price /Unavailable
