Mammut Relax Down Bag 0C Sleeping Bag - Duck Down, 600 cuin, Left Zip, RDS

After a long day on the trail, there's nothing like crawling into a warm, lofty sleeping bag. The Mammut Relax Down Bag 0C is built for campers and backpackers who want reliable comfort when temperatures hover around freezing. Its duck down insulation with 600 cuin fill power delivers excellent warmth-to-weight ratio, while the H-box baffle construction keeps the down evenly distributed to eliminate cold spots. The left-side YKK anti-snag zipper runs smoothly, and the draft collar plus internal pocket add practical touches for a restful night.

Key specifications

• EN Comfort Temperature: 5 °C
• EN Limit Temperature: 0 °C
• EN Extreme Temperature: -15 °C
• Insulation Type: Duck Down
• Fill Power: 600 cuin
• Fill Weight: 600 g
• Max User Height: 180 cm
• Shoulder Width: 80 cm
• Foot Width: 50 cm
• Packed Volume: 6.5 L
• Shell Material: 100% Polyamide
• Lining Material: 100% Polyamide
• Zipper Side: Left
• Zipper Type: YKK, Anti-snag
• Construction: H-Box Baffles
• Sustainability Certifications: RDS (Responsible Down Standard)
• PFC-Free: Yes
• Internal Pocket: Yes
• Draft Collar: Yes
• Included Accessories: Compression Sack, Storage Bag

Why choose it

The Mammut Relax Down Bag 0C balances warmth, weight, and packability. The 600 cuin duck down offers high loft and compressibility, while the 6.5 L packed volume means it won't hog space in your pack. The RDS certification ensures ethical sourcing of the down, and the PFC-free treatment aligns with eco-conscious values. The anti-snag zipper and draft collar are thoughtful details that make a real difference when you're tired and just want to sleep.

Ideal use cases

• Three-season backpacking and trekking
• Car camping in spring, summer, and early autumn
• Bikepacking and adventure travel where pack size matters
• Hostel or hut stays where you need your own bedding

Good to know

This bag is designed for users up to 180 cm tall, with a shoulder width of 80 cm and foot width of 50 cm for a comfortable, not restrictive fit. The included compression sack makes packing easy, and the storage bag helps maintain loft during off-season storage. The left-side zipper is convenient for right-handed users who prefer to zip with their right hand.