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Zenbivy Core Bed in bright blue, modular sleeping bag system offering comfort and simplicity for camping and backpacking adventures.

Our Simplest, Softest, and Most Affordable Backpacking Bed

The Zenbivy Core Bed delivers the perfect balance of weight, comfort, and cost making premium wilderness sleep accessible to every adventurer. New 2025 Core Beds are lighter than ever before, with a new 20D Nylon shell.

Shop Core Beds

Pair a quilt with a sheet to create a Zenbivy Core Bed

  • Core Quilt
    NEW

    Core Quilt

    From $119.00
  • Core Sheet
    NEW

    Core Sheet

    From $69.00

Shop Core Bed Doubles

Pair a quilt with a sheet to create a Zenbivy Core Bed Double

Close-up of Zenbivy Nylon Taffeta shell fabric, available in 15D and 20D, smooth and durable material used in camping quilts and sleeping bags.

New for 2025

Lighter-Than-Ever Shell

2025 Core Beds are lighter than ever before! We've swapped the heavier 30D Nylon shell for the same buttery-smooth but lighter 20D Nylon shell.

Reimagined Core Sheets

  • 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.

  • 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!

Close-up of soft, blue 50D Polyester Pongee fabric used in Zenbivy sleeping bags, highlighting its smooth, luxurious texture designed for camping comfort.

new for 2025

Our Legendary Pongee Liner, Now DWR-Free

In 2025, all Zenbivy Pongee liners are DWR-free—a major step in our mission to create more natural, skin-friendly, and chemical-free outdoor gear. 

With our fabrics already coating-free, the only treatment we use is a PFAS-free DWR on shell fabrics.

Zenbivy sheets shown fitted over rectangular and tapered camping mattresses, highlighting compatibility with most standard mattress shapes and sizes.

Fits Most Mattresses

Zenbivy sheets are designed to fit most standard size mattresses on the market, including rectangular and tapered styles.

Double sheets work on one mattress, or two!

View the Size Guide
Visual breakdown of the Zenbivy Core Bed system showing three components: Core Sheet (7 oz), Core Quilt (1 lb 10 oz), and the combined Core Bed (2 lb 1 oz), illustrating weight and modular design.

Complete Your Core Bed Set Up

Pair your Core Bed with a mattress, pillow, and dry sack to complete your Zenbivy sleep system.

Core Bed Footbox Styles

  • Unlike sewn footboxes that restrict your movement and do not vent, Zenbivy’s patent-pending Fast Footbox™ uses a single clip that allows it to expand for more space or narrow for more warmth.

    Fast Footbox™

    Unlike sewn footboxes that restrict your movement and do not vent, Zenbivy’s patent-pending Fast Footbox™ uses a single clip that allows it to expand for more space or narrow for more warmth.

  • Green Zenbivy Core Quilt Double shown with its spacious fixed double footbox, designed for warmth and freedom of movement on cold nights.

    Fixed Double Footbox

    The Core Quilt Double features a wide and spacious fixed footbox that allows you to tuck in on cold nights and still be able to naturally move your feet and sprawl or quickly "kick off the covers" if needed.

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.

How our patented 2-piece design works to...

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.

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.

Learn more

Explore More Features

Zenbivy Core Quilt system in blue, lightweight modular sleeping bag setup shown inside tent with camper organizing gear in forest campsite.

Explore the Materials

  • Close-up of soft, blue 50D Polyester Pongee fabric used in Zenbivy sleeping bags, highlighting its smooth, luxurious texture designed for camping comfort.

    50D Polyester Pongee

    Our legendary 50D Pongee fabric is pure luxury. It's both durable, soft and—most importantly—has a similar feel to a sheet you would use at home, bringing a familiar kind of comfort to camp.

  • Close-up of Zenbivy Nylon Taffeta shell fabric, available in 15D and 20D, smooth and durable material used in camping quilts and sleeping bags.

    20D Nylon Taffeta

    20D fabrics are much softer than traditional ultralight technical fabrics while being only a fraction heavier. They’re buttery-smooth, comfortable, and durable.

  • Close-up of premium down insulation fibers used in Zenbivy sleeping bags and quilts, providing lightweight warmth for backpacking.

    650FP RDS-Compliant Down

    Our premium 650 fill-power down is RDS (Responsible Down Standard) compliant and provides the best bang for your buck.

  • Close-up of Zenbivy Core Bed's yellow color-coded clip attachment, designed for secure, draft-free connection between quilt and sheet.

    Lightweight Clip Attachments

    Our color-coded clip closures are nearly weightless, proven draft-free, and practically disappear when you're using the quilt on its own.

Core Quilt
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Core Sheet
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Core Quilt Double
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Core Sheet Double
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Color
Color
Price
Price
From $119.00
From $69.00
$399.00
$129.00
Weight
Weight

25°F Down

  • Regular: 1 lb 10 oz (737 g)
  • Large: 1 lb 13 oz (822 g)
  • XL: 2 lb 2 oz (963 g)

10°F Down

  • Regular: 2 lb 3 oz (992 g)
  • Large: 2 lb 9 oz (1.16 kg)
  • XL: 2 lb 15 oz (1.33 g)

25°F Synthetic

  • Regular: 2 lb 1 oz (935 g)
  • Large: 2 lb 6 oz (1.07 kg)
  • XL: 2 lb 12 oz (1.24 kg)

Uninsulated

  • 25": 7 oz (198 g)
  • 30": 8 oz (226 g)

Down

  • 25": 11 oz (311 g)
  • 30": 12 oz (340 g)

Synthetic

  • 25": 14 oz (396 g)
  • 30": 15 oz (425 g)

3 lb 9 oz (1.61 kg)

1 lb 9 oz (708 g)

Limit / Comfort Rating
Limit / Comfort Rating

25°F Down & Synthetic: 25°F (-4°C) / 35°F (2°C)

10°F Down: 10°F (-12°C) / 20°F (-7°C)

Uninsulated: N/A

Down & Synthetic: 25°F (-4°C) / 35°F (2°C)

25°F (-4°C) / 35°F (2°C)

25°F (-4°C) / 35°F (2°C)

Fill
Fill

Down: 650FP RDS-compliant, no WR treatment 80/20 Duck Down

Synthetic: UTF New2 Polyester batting (120gsm X 2 layers)

Uninsulated: N/A

Down: 650FP RDS-compliant, no WR treatment 80/20 Duck Down

Synthetic: UTF New2 Polyester batting (120gsm X 2 layers)

650FP RDS-compliant, no WR treatment 80/20 Duck Down

UTF New2 Polyester batting (120gsm X 2 layers)

Fill Weight
Fill Weight

25°F Down

  • Regular: 395 g
  • Large: 450 g
  • XL: 520 g

10°F Down

  • Regular: 641 g
  • Large: 751 g
  • XL: 860 g

Core Sheet Down

  • 25": 66 g
  • 30": 74.5 g

937 g

276 g

Fabric
Fabric

Liner: 50D Polyester Pongee, cire, coating-free, 62gsm

Shell: 20D Nylon Taffeta, cire, coating-free, fluorocarbon-free DWR (PFAS-free), 36gsm

Liner: 50D Polyester Pongee, cire, coating-free, 62gsm

Shell: 20D Nylon Taffeta, cire, coating-free, fluorocarbon-free DWR (PFAS-free), 36gsm

Liner: 50D Polyester Pongee, coating-free, cire & non-cire, 62gsm

Shell: 20D Nylon Taffeta, cire & non-cire, coating-free, fluorocarbon-free DWR (PFAS-free)

Liner: 50D Polyester Pongee, coating-free, cire & non-cire, 62gsm

Shell: 20D Nylon Taffeta, cire & non-cire, coating-free, fluorocarbon-free DWR (PFAS-free)

Sheet Sizing
Sheet Sizing
-

25": Fits mattresses up to 26” x 78” x 3.5"+ (66 x 198 x 9+ cm)

30": Fits mattresses up to 31" x 80" x 3.5"+ (79 x 203 x 9+ cm)

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Fits mattresses up to 52" x 78" x 3.5” (132 x 198 x 9 cm)

Recommended Dry Sack Size
Recommended Dry Sack Size

All 25°F Down: 10L

All 10°F Down: 15L

All 25°F Synthetic: 15L

Dry Sack sold separately

-

20L

Dry Sack sold separately

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