• Hyke & Byke Katahdin 0°F cold weather mummy hiking and backpacking sleeping bag, synthetic 625 FP, charcoal gray with compression sack.
  • Cold weather mummy hiking and backpacking sleeping bag, synthetic 625 FP, 4-season, green.
  • Hyke & Byke Katahdin 0°F cold weather mummy hiking & backpacking sleeping bag, synthetic 625 FP, 4-season, dark red color.
  • Hyke & Byke Katahdin 0°F cold weather mummy hiking and backpacking sleeping bag using ultralight 625 fill power ClusterLoft synthetic insulation.
  • Hyke & Byke Katahdin 0°F cold weather mummy sleeping bag with water-resistant 400T, 20D ripstop nylon fabric liner.
  • Hyke & Byke cold weather mummy hiking sleeping bag with easy temperature regulation features.
  • Hyke & Byke Katahdin 0°F cold weather mummy sleeping bag for thru-hiking, backpacking, and camping.
  • Vegan sleeping bag filled with 100% synthetic fibers, ideal for hiking and camping.
  • Ultralight 0°F 4-season sleeping bag size chart.
  • USA-based brand offering premium quality camping gear in a tent setting.
  • Hyke & Byke Katahdin 0°F cold weather mummy sleeping bag with 625 fill power ClusterLoft synthetic insulation.
  • Hyke & Byke Katahdin 0°F mummy sleeping bag, green, water repellent, durable with ripstop nylon fabric liner.
  • Cold weather mummy hiking sleeping bag with adjustable ventilation, two-way YKK zippers, and drawstrings.
  • Cold weather mummy sleeping bag for hiking and backpacking, synthetic 625 FP, 4-season.
  • Cold weather hiking sleeping bag with synthetic fibers in outdoor setting.
  • Ultralight 0°F 4-season sleeping bag size and weight chart for short, regular, and long users.
  • USA-based brand offering premium quality camping gear with two people in a tent using a Hyke & Byke sleeping bag.
  • Cold weather mummy hiking & backpacking sleeping bag with 625 FP synthetic insulation.
  • Cold weather mummy hiking backpacking sleeping bag with synthetic 625 FP, water repellent DWR coated 400T 20D ripstop nylon fabric liner.
  • Sleeping bag with easy temperature regulation, showing two-way YKK zippers and drawstrings for ventilation.
  • Cold weather hiking and backpacking mummy sleeping bag with synthetic insulation for 4-season use.
  • Vegan synthetic sleeping bag for cold weather hiking and backpacking.
  • Cold weather mummy hiking and backpacking sleeping bag, synthetic 625 FP, 4-season.

Hyke & Byke Katahdin 0°F Cold Weather Mummy Hiking & Backpacking Sleeping Bag

Hyke & Byke Katahdin 0°F Cold Weather Mummy Hiking & Backpacking Sleeping Bag

 (126 Reviews)
$136.46 USD
$136.46 USD
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A man standing in a Hyke & Byke sleeping bad on location in a northern climate.

Outdoor Gear That Eliminates Poverty

Hyke & Byke was founded on the principle of extending the wilderness to everyone through providing quality products, that we ourselves use, affordably. Ultralight backpacking, bouldering, peak bagging, and camping are hobbies, a mindset, and a way of life that we want to share with everyone.


Choose the Right Zero-Degree Sleeping Bag for You

Katahdin mummy-style 0 F sleeping bag for hiking and camping

Katahdin 0 F

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Antero 0 F

 Crestone camping sleeping bag

Crestone 0 F
Fill Power
625 FP 800 FP 650 FP 800 FP 650 FP
Fill Type
Adv. Synthetic ClusterLoft Hydrophobic 90/10 Goose Down Hydrophobic 80/20 Duck Down Hydrophobic 90/10 Goose Down Hydrophobic 80/20 Duck Down
Pack Weight
3.27 / 3.54 / 3.91 lbs. 2.90 / 3.10 / 3.36 lbs. 3.23 / 3.38 / 3.56 lbs. 3.45 / 3.71 lbs. 3.58 / 3.83 lbs.
Fabric Toughness
400T, 20D Ripstop Nylon 400T, 20D Ripstop Nylon 400T, 20D Ripstop Nylon 400T, 20D Ripstop Nylon 400T, 20D Ripstop Nylon
Shell Base
Adv. Synthetic ClusterLoft Adv. Synthetic ClusterLoft Adv. Synthetic ClusterLoft Adv. Synthetic ClusterLoft Adv. Synthetic ClusterLoft
Special Features
100% Vegan Materials Ultralight for a 0 F mummy bag Warmest 4-season comfort Hammock-compatible Hammock-compatible
Comfort Temperature
30F / -1C 30F / -1C 30F / -1C 30F / -1C 30F / -1C
Comfort Limit
15F / -10C 15F / -10C 15F / -10C 15F / -10C 15F / -10C
Survival Limit
0F / -17C 0F / -17C 0F / -17C 0F / -17C 0F / -17C
Compressed Pack Size
8" x 13.5" 7.5" x 12.5" 8" x 13" 7" x 10" 8" x 11"


Hyke & Byke branding on a Katahdin camping sleeping bag. 625 fill power using synthetic ClusterLoft

625 FP Advanced Synthetic

Tests warmer than premium 600 FP Goose Down. High loft, yet packs efficiently. Water-resistant & breathable. Lightweight & durable.

Internal gear pocket

Secured Internal Gear Pocket

Handy internal gear pocket with secure hook & loop closure to stash cell phone, mini flashlight, headphones, & other amenities.

YYK Anti-snag zipper

YKK Anti-Snag Zipper

YKK zippers are manufactured with high standards and thorough quality control processes. Zips tight and reduces snag during regular use.

3-point compression sack for camping sleeping bags

Included Compression Sack

Lightweight but tough 400T, 20D ripstop nylon. Compress your Katahdin sleeping bag down to just 11" long and 8" in diameter.

Hyke & Byke Synthetic Mummy Sleeping Bag

Down-like Warmth and Performance from a Synthetic

Typical synthetic insulation tests to be 300-400 FP (Fill Power), while our innovative ClusterLoft Advanced Synthetic tests to have a loft equivalent to 625 FP. This is a higher fill power than even many down sleeping bags on the market.

Hyke & Byke Katahdin Synthetic Sleeping Bags

Ultra-Lightweight & Ultra Compact

Our ClusterLoft Advanced Synthetic insulation boasts a higher warmth-to-weight ratio than most other synthetic sleeping bags. And, because it's a synthetic, it's both more compressible and durable than down, giving you a high-end sleeping bag that is incredibly versatile.

USA Based Company

Gear That Gives

Hyke & Byke LLC is committed to eliminating poverty to through Kiva sponsors and is a member of the Conservation Alliance. Designed for Adventure and Designed in the USA, our mission is to create honest, top-quality, and innovative gear for you to live your adventures.

Hyke & Byke tent with dramatic sunrise.
  • Nylon
  • 0 Degree Sleeping Bag - The Katahdin mummy sleeping bag uses our Advanced ClusterLoft synthetic fibers instead of traditional down. 100% vegan, this 625 Fill Power synthetic tests warmer than premium 600 FP goose down. High loft, yet packs efficiently
  • Save Space & Shave Weight - This 4 Season winter sleeping bag is professionally designed for thru-hiking, backpacking and camping in temperatures down to zero degrees Fahrenheit. Ultralight for its class of bags, the Katahdin cold weather sleeping bag boasts a superior warmth-to-weight ratio at only 3.54 lbs. (Regular Size)
  • Hydrophobic & Water-resistant - The 400T 20D ripstop nylon liner is coated with water repellant DWR, and synthetic fill like ClusterLoft will always outperform traditional down in wet environments. The superior YKK zippers are also more water-resistant than typical zippers
  • Camping Sleeping Bags - Recommended for newer backpackers who want maximum versatility on a budget. Includes an internal storage pocket and a compression stuff sack that packs your Katahdin compact sleeping bag down to just 11 inches long and 8 inches in diameter
  • Hyke & Byke Sleeping Bags - USA-based brand offers a collection of premium quality camping accessories and gear suitable for adults and children alike for all your adventures in the Great Outdoors
Brand Hyke & Byke
Color Charcoal Gray
Occupancy 1 Person
Shape Mummy
Seasons All Seasons
Age Range (Description) Adult, Kids
Sport Camping & Hiking
Material Nylon
Fill Material Advanced Synthetic
Product Dimensions 60"L x 11"W
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Hyke & Byke Katahdin 0°F Cold Weather Mummy Hiking & Backpacking Sleeping Bag

$136.46 USD
$136.46 USD
SAVE % Sold out