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Kingcamp

KingCamp Oasis C 350 Sleeping Bag | 3-Season Cotton Flannel-Lined Envelope Bag

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

Iso-certified 3-season

Sleeping bag for spring, summer,

100% Cotton

Flannel lining for a soft,

350g/m² Hollow

Fiber insulation for balanced warmth

Envelope-style Rectangular

Extended hood and generous shoulder

Full-length Two-way

Adjustable hood and zipper baffle

$59.99
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SKU: kingcamp-oasis-c-350-sleeping-bag-3-season-cotton-flannel-lined-

Overview

Built for campers who want a more comfortable night outdoors, this envelope-style sleeping bag is suited to spring, summer, and fall trips where warmth and room to move both matter. The cotton flannel lining and hollow fiber insulation are paired with a roomy cut, extended hood, and adjustable hood design to create a relaxed sleep setup for car camping, RV use, backyard overnights, and festival stays. Practical touches like the full-length two-way zipper, draft-reducing collar baffle, and included compression storage bag make it easier to manage in camp and pack away between trips. It also offers a straightforward option for couples, since two bags can zip together for added sleeping space.

Why Hunters Choose the Kingcamp

Iso-certified 3-season

Temperature ratings support spring, summer,

100% Cotton

Flannel lining offers a soft,

Spacious Envelope

Extended hood provides generous room

Full-length Two-way

Zipper allows top or bottom

Compression Storage

Bag included for easier packing

Key Features

  • ISO-certified 3-season sleeping bag for spring, summer, and fall use.
  • 100% cotton flannel lining for a soft, breathable feel.
  • 350g/m² hollow fiber insulation for balanced warmth.
  • Envelope-style rectangular design with extended hood and generous shoulder room.
  • Full-length two-way zipper with adjustable hood and zipper baffle.
  • Includes compression storage bag for compact packing and transport.

Best Used For

  • Spring, summer, and fall campers wanting a comfortable three-season sleeping bag
  • Car campers and RV travelers who value a roomy, home-like sleep setup
  • Backyard sleepout users needing a soft, practical bag for occasional overnight stays
  • Festival and outdoor event attendees looking for portable warmth and easy packing
  • Couples who want two bags zipped together for shared sleeping space

Specifications

IncludedSleeping Bag, Compression Storage Bag
Insulation350g/m^2 Polyester Hollow Fiber Fill
Lining100% Cotton Flannel
Packed SizeCompression Sack - Compact Storage
ShapeRectangular / Envelope with Hood
Shell Fabric190T Polyester with Water-Repellent Coating
StorageCompression Sack with 4-Way Cinch
Temperature Rating Iso Comfort43°F (6°C)
Temperature Rating Iso Extreme7°F (-14°C)
Temperature Rating Iso Lower Limit34°F (1°C)
Unfolded Size(190+30) x 75 cm / (74.8" + 11.8") x 29.5"
Weight1.8 kg (3.97 lbs)
ZipperFull-Length Two-Way with Inner/Outer Pulls

Pros

  • ISO-certified 3-season temperature ratings support spring, summer, and fall camping use.
  • 100% cotton flannel lining offers a soft, breathable feel against the skin.
  • Spacious envelope shape with extended hood provides generous room to move.
  • Full-length two-way zipper allows top or bottom ventilation as conditions change.
  • Compression storage bag included for easier packing and transport.
  • Two bags can zip together for shared sleeping space.

Considerations & Trade-offs

  • The envelope-style, roomier fit is comfortable, but it is less compact than more tapered sleeping bag designs.
  • The cotton flannel lining prioritizes softness and comfort, which may be less suited to users who want a lighter, more minimalist sleep system.
  • The ISO comfort rating is 43°F (6°C), so colder conditions will likely call for additional insulation or a different bag.
  • The water-repellent shell can help with dew and light moisture, but it is not a substitute for full waterproof protection in sustained wet weather.

Suggested Comparisons

  • 3-season envelope sleeping bag
  • cotton flannel-lined sleeping bag
  • camping sleeping bag with hood
  • compression-stored sleeping bag

Suggested Accessories

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

Frequently Asked Questions

What temperature range is this sleeping bag rated for?

The ISO-tested ratings listed are 43°F (6°C) comfort, 34°F (1°C) lower limit, and 7°F (-14°C) extreme.

Is the lining suitable for hunters who want a softer feel than typical synthetic bags?

Yes. The product description says it uses a 100% cotton flannel lining, described as soft, breathable, and naturally warm.

How much room does the bag provide?

It is an envelope-style, rectangular bag with a roomy fit. The listed unfolded size is 74.8" + 11.8" long by 29.5" wide, and the extended hood adds extra headroom.

Can this bag be vented if temperatures rise during the night?

Yes. The features include a full-length two-way zipper and a foot zipper, both of which can be used for ventilation.

Does it come with storage gear for transport?

Yes. The product includes a compression storage bag with a four-sided cinch for packing and transport.