Sleeping BagKingcampSold by BroadOut

Kingcamp

KingCamp FREESPACE 350 Flannel Sleeping Bag-Envelope With Hood

Our editorial team reviews specifications, product data, and field-use information to keep pages accurate.

Envelope Sleeping

Hood for one-person use

230t Polyester

Diamond grid pattern

100% Cotton

Oblique quilting design

350g Hollow

Cotton filling for added warmth

Adjustable Brim,

Chest collar, and zipper windshield

$99.99
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SKU: kingcamp-freespace-350-sleeping-bag-envelope-with-hood

Overview

Built for one-person use, this envelope-style sleeping bag is aimed at campers who want a warmer, more comfortable sleep system with practical details for outdoor trips. The cotton flannel lining, hood with drawstring, zipper windshield, and chest collar are all intended to help hold in warmth, while the double-zipper design allows it to open fully and function as a quilt when conditions are milder. It also includes an anti-pinch zipper, Velcro collar, side hanging pocket, and compression bag for easier handling and storage. With a tested comfort rating of 39.2°F and a lower limit of 30.2°F, it suits cool-weather overnight use where comfort and convenience matter.

Why Hunters Choose the Kingcamp

100% Cotton

Flannel lining adds a soft,

350g Hollow

Cotton fill provides substantial insulation

Adjustable Hood

Brim and chest collar help

Zipper Windshield,

Velcro collar, and drawstring add

Double Zipper

Design allows full opening for

Key Features

  • Envelope sleeping bag with hood for one-person use.
  • 230T polyester outer fabric with diamond grid pattern.
  • 100% cotton flannel lining with oblique quilting design.
  • 350g hollow cotton filling for added warmth.
  • Adjustable brim, chest collar, and zipper windshield help retain heat.
  • Double zippers allow full opening for quilt-style use.
  • Includes oxford cloth compression bag for compact storage and transport.

Best Used For

  • Cold-weather campers wanting a roomy one-person bag with a hood and draft-reducing closures.
  • Hunters needing a comfortable sleeping bag for base camp or truck-bed overnights.
  • Outdoor users who prefer a flannel-lined bag that can fully open as a quilt.
  • Campers packing for trips where compact storage and included compression bag matter.
  • Users who want simple, practical features like double zippers, hanging loop, and side pocket.

Specifications

Anti Pinch ZipperYes
Chest CollarYes
Compression Bag MaterialOxford cloth
Compression Outer BagYes
Double ZipperYes
Drawstring BrimYes
Expanded Size86.6 x 39.4 inches
Filling100% Polyester 350g
Hanging LoopYes
HoodYes
Inner Lining100% cotton flannel
Lining100% flannel
Material230T polyester with a diamond grid pattern
Outer Bag Fabric100% Polyester 210D Oxford Cloth
Package Size42 x 25 cm / 16.5 x 9.8 in
Quilting DesignOblique quilting design
Side Hanging PocketYes
Single Product Weight2.4 kg / 5.3 lbs
Sleeping Capacity1-person
Temperature Rating Tested Comfort39.2 degrees (F) - ISO
Temperature Rating Tested Extreme1.4 degrees (F) - ISO
Temperature Rating Tested Lower Limit30.2 degrees (F) - ISO
Velcro CollarYes
Water RepellentYes
Zipper Loop On CollarYes
Zipper WindshieldYes

Pros

  • 100% cotton flannel lining adds a soft, comfortable interior feel.
  • 350g hollow cotton fill provides substantial insulation for colder outings.
  • Adjustable hood brim and chest collar help seal in warmth.
  • Zipper windshield, Velcro collar, and drawstring add layered closure options.
  • Double zipper design allows full opening for use as a quilt.
  • Includes compression bag and hanging loop for storage and airing out.

Considerations & Trade-offs

  • The tested comfort rating is 39.2°F, so it may be more of a cool-weather option than a true cold-weather bag for some users.
  • At 86.6 x 39.4 inches, the envelope shape offers room to move, but it may feel less enclosed than a mummy-style bag for those prioritizing a tighter fit.
  • The 5.3 lb weight and included compression bag make it packable, but it is not especially light for hunters trying to minimize carried weight.
  • The flannel lining and added closure features emphasize comfort and warmth, but they also suggest a more comfort-focused design rather than a minimalist backcountry setup.

Suggested Comparisons

  • Cold-weather sleeping bags
  • Rectangular sleeping bags
  • Sleeping bag liners
  • Compression stuff sacks

Suggested Accessories

  • Sleeping bag liner
  • Compression sack
  • Camping pillow
  • Sleeping pad

Frequently Asked Questions

What temperature range is this sleeping bag rated for?

The listed ISO-tested ratings are 39.2°F comfort, 30.2°F lower limit, and 1.4°F extreme.

Is this a one-person sleeping bag?

Yes. The specifications list it as a 1-person sleeping bag.

Can the zipper be opened fully for use as a quilt?

Yes. The long description says the double zipper can be fully opened to use the sleeping bag as a quilt.

What materials are listed for the lining, filling, and outer fabric?

The lining is 100% flannel, the filling is 100% polyester 350g hollow cotton, and the outer bag fabric is 100% polyester 210D Oxford cloth.

Does it include a storage or compression bag?

Yes. The product includes an Oxford cloth compression bag for compact storage and transport.