Sea to Summit
MC III 28° Sleeping Bag

The Sea to Summit MC III 28 degree sleeping bag is the warmest bag in the Micro Series, and the best choice if you need the smallest possible option for sub-freezing temperatures. Fully-featured and ultralight, this down sleeping bag is EN-rated to a lower-limit temperature of 28 degrees F and a comfort temperature of 39 degrees F.

The Micro Series down sleeping bags focus on ultralight performance for trekking or traveling. Sea to Summit uses the highest-quality European goose down available, rated at 850+ loft and backed up by a certification document included with each sleeping bag. 2D NanoShell™ technology provides the lightest, most breathable water-resistant shell available. Temperature ratings are the result of honest, third-party EN testing performed on each sleeping bag.

With quilted baffle construction to optimize down placement and a contoured mummy shape, the Micro sleeping bags feature the best warmth-to-weight ratio in their class. A unique drawstring opening at the foot helps regulate temperature, and the MC III can be converted from a technical sleeping bag to an open duvet by simply unzipping it. The 55:45 fill ratio and form-fitting shape allow the bag to rotate with you throughout the night. The soft-touch lining fabric is down-proof and highly breathable for comfort, and an easily-accessible security pocket inside the bag is ideal for stowing electronics to preserve battery performance in cold weather.

The Micro Series is Sea to Summit's choice for cycle touring across the Pyrenees, adventure travel on the Inca Trail in South America and light backpacking in the Sierras. These down sleeping bags are so revolutionary we can’t fit all of the information here, so check out this series of articles on our blog!

• Box quilted mummy convertible
• 2D NanoShell™
• Differential cut shell
• Box quilted baffles
• 55/45 fill ratio
• Zip draft tube with anti-snag
• Hood drawcord with dual adjustment
• YKK #3 side zip
• Drawcord foot closure,
• Large sized internal zip pocket
• Includes lightweight Ultra-Sil® compression bag, mesh storage cell and laundry bag
• Down: 850+ Loft, 95% European Goose Down
• Fill Weight: Regular: 12.35 oz / 350 grams Long: 13.40 oz / 380 grams
• Bag Weight: Regular: 1.50 pounds / 680 grams Long: 1.65 pounds / 755 grams
• Recommended Max Height: Regular: <6' Long : <6'7"
• Sleeping bag dimensions Internal circumference (Chest, Hip Foot): Regular: 56.69", 50.39", 34.65" Long : 59.05", 52.75", 37"
• Temp Rating: Comfort: 45 DegreeF / 4 DegreeC Lower Limit: 28 DegreeF / -2 DegreeC Extreme: 0 DegreeF / -18 DegreeC
• Zipper Option: Regular: Right only Long: Left only
• Season Rating: Spring/Autumn/Winter
• Suggested Use: Ultra lightweight backpacking, travel, hiking, camping, cycle touring
• Compression Bag: XSmall - 6L to 2L

Gender: Unisex
Weight: 1.50 pounds
Zipper Type: Left Zip
Season: N/A
Vendor ProductId: 033LL
Review ProductId: 25332

Interested in some of the more technical elements included in the Sea to Summit Micro Series of down sleeping bags? Check out our series of blog articles about these sleeping bag features:

IDFL down fill certification
EN temperature ratings