The North Face One Bag Mummy Sleeping Bag – 3-Season Modular Sleep System

Experience ultimate camping comfort with The North Face’s innovative 3-in-1 modular sleeping bag, designed for 5°F to 40°F adventures. This versatile mummy bag adapts to changing weather with interchangeable layers, making it the perfect all-season sleep solution for backpackers and winter campers.

Key Features & Benefits

✔ Modular Design – Combine the synthetic outer shell (40°F) with the 800-fill goose down mid-layer (5°F) for customizable warmth.
✔ Ultra-Warm & Lightweight – The removable down quilt provides superior insulation, while the water-resistant down ensures performance in damp conditions.
✔ Multi-Functional Comfort – Use the mid-layer as a warm shawl or roll the bottom into a pillow for added convenience.
✔ Easy Adjustability – Quick-zipper transitions between three configurations: solo outer (20°F), solo inner (40°F), or combined (5°F).
✔ Compact & Durable – Made with 20D nylon shell and lining, this bag packs down to just 10″ x 14″, ideal for backpacking.

Technical Specs

• EN Tested Ratings: Comfort (29°F / 46°F), Lower Limit (17°F / 38°F)
• Weight: 4 lbs. 10 oz. (Regular, Left Zip)
• Dimensions: Fits up to 78″ tall, 61″ shoulder girth
• Insulation: Water-resistant 800-fill goose down + synthetic

Whether you’re braving winter expeditions or mild summer nights, this adaptable sleeping bag ensures warmth, comfort, and convenience—all in one high-performance system.

Optimize your sleep setup—explore The North Face’s best-selling modular mummy bag today!