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Zenbivy’s Simplest, Softest, and Most Affordable Backpacking Bed

The Core Bed's proven draft-free clip system keeps things minimal and lightweight for backpacking while the soft 50D Pongee liner and supple 30D Nylon Taffeta shell provide home-like comfort at camp. Our patent-pending Fast Footbox™ along with 650 fill-power down and synthetic options make the Core Bed Zenbivy's simplest and most affordable backpacking bed.

Pair a Core Quilt with a Core Sheet to create a Zenbivy Core Bed.

Core Sheets Are Lighter Than Ever. What Changed for 2024?

  • New Core Sheets are comfort-mapped, swapping panels of 50D Pongee for our soft 30D Taffeta to save weight.
  • Core Sheets feature our new headboard clips to keep your Zenbivy SoftTop™ Pillow in place.
  • Sheets are available in a NEW 650fp down insulated style.
  • All clips are attached with webbing instead of cord for added strength and durability.

Fits Most Mattresses!

The Core Sheet is designed to fit most standard size mattresses on the market, including rectangular and tapered styles.

Match the width of the sheet to the width of the mattress you plan to use it on. For more information, please see our Size Guide.

Explore the Features

  • Blocks 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.

  • Eliminates 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.

  • 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.

  • Kylie-Curve™

    Other quilts have a drawstring running the full width of the quilt. When cinched, it’ll shorten, lifting the sides and letting in drafts. The baffle-backed Kylie-curve™ cinches only the center of a Zenbivy quilt, leaving either side loose to drape around you or tuck into the hood to block drafts around your shoulders.

  • Thermally-Mapped Baffles

    We designed our quilts for thermal efficiency, distributing the down fill to provide the most warmth where it's needed, with smaller baffles to minimize downshift. We focus primarily on keeping the heat at your core and feet, but provide ample insulation in every chamber for consistent warmth.

  • Semi-Rectangular Design

    Other quilts are commonly hourglass in shape, creating a pinch point that causes the quilt to grab and twist as you move. Zenbivy quilts are semi-rectangular, providing you the space and freedom to move naturally—without constriction.

  • Integrated Insulated Hood

    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.

  • Built-in Headboard Clips

    The sheet's integrated hood features built-in headboard clips that attach to your Zenbivy pillow to keep it from sliding off the mattress, just like your headboard at home. 

    *Only new 2024 sheets and pillows feature the clip attachments. 2023 and older models do not.

Pack It Up

Grab a fully-welded Zenbivy Dry Sack to pack and compress your Core Bed for backpacking.

We recommend:

  • 10L for all 25° Down Core Beds
  • 15L for all 25° Synthetic Core Beds
  • 15L for all 10° Down Core Beds

Dry Sack and Compression Caps sold separately.

Explore the Materials

  • 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.

  • 30D Nylon Taffeta

    A slightly heavier weight than our 20D Taffeta, the 30D Nylon Taffeta is amazingly supple and durable. It's our softest shell fabric.

  • 650 Fill Duck Down

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

  • Lightweight Clip Attachments

    Our proven draft-free color-coded clip system is nearly weightless compared to zippers. Our clip quilts and sheets are more versatile since any clip quilt can be paired will any clip sheet, allowing you to mix and match to build your perfect setup.

  • 1D/3D XD Synthetic

    Built for warmer nights, tighter budgets, and personal preferences, we've used a polyester synthetic blend that's as soft as it gets. So soft in fact that you'll swear it's down!


A table comparing the facets of 2 products
Core Quilt
Core Sheet

25° Down

  • Regular: 1 lb 9 oz (708 g)
  • Large: 1 lb 12 oz (793 g)
  • XL: 2 lb (907 g)

10° Down

  • Regular: 2 lb 4 oz (1.02 kg)
  • Large: 2 lb 10 oz (1.19 kg)
  • XL: 3 lb (1.36 kg)

25° Synthetic

  • Regular: 2 lb 3 oz (992 g)
  • Large: 2 lb 9 oz (1.16 kg)
  • XL: 2 lb 14 oz (1.30 kg)


  • 20": 6.1 oz (173 g)
  • 25": 7.0 oz (198 g)
  • 30": 7.8 oz (221 g)


  • 20": 9.9 oz (281 g)
  • 25": 11.2 oz (317 g)
  • 30": 12.4 oz (351 g)


  • 20": 13.1 oz (371 g)
  • 25": 14.8 oz (419 g)
  • 30": 15.9 oz (451 g)
Limit / Comfort Rating
Limit / Comfort Rating

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

10° Down: 10°F (-12°C) / 20°F (-7°C)

Uninsulated: N/A

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


Down: 650 fill-power RDS compliant 80/20 duck down

Synthetic: 240g 1D/3D XD Polyester batting

Uninsulated: N/A

Down: 650 fill-power RDS-compliant 80/20 duck down

Synthetic: 240g 1D/3D XD Polyester batting

Fill Weight
Fill Weight

25° Down

  • Regular: 336 g
  • Large: 379 g
  • XL: 438 g

10° Down

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

Core Sheet Down

  • 20": 63 g
  • 25": 66 g
  • 30": 74.5 g

Shell: 30D Nylon Taffeta 350T, coating-free, cire, fluorocarbon-free DWR, 50gsm

Lining: 50D Polyester Pongee 300T, coating-free, cire, 62gsm

Shell: 30D Nylon Taffeta 350T, coating-free, cire, fluorocarbon-free DWR, 50gsm

Lining: 50D Polyester Pongee 300T, coating-free, cire, 62gsm

Sheet Sizing
Sheet Sizing

20": Fits mattresses up to 21” x 72” x 3.5"+ (53 x 183 x 9+ cm)

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

30": Fits mattresses up to 30" x 80" x 3.5"+ (76 x 203 x 9+ cm)

Recommended Dry Sack Size
Recommended Dry Sack Size

All 25° Down: 10L

All 10° Down: 15L

All 25° Synthetic: 15L

Dry Sack sold separately