Mountain Equipment Helium GT 400 Sleeping bag (-5°C/23°F)

The Helium GT series offers a more spacious fit than the standard Helium range, making it perfect for extended use and added comfort. Featuring 449g of minimum 700-fill power DOWN CODEX-approved duck down and 100% recycled Helium 20D outer fabric, the Helium GT 400 is lightweight and comfortable, ideal for backpacking and cycle touring while still warm enough for chilly nights.

Slant-baffle construction maximises warmth, improves packability, and keeps down in place to prevent cold spots. A four-baffle foot system ensures warmth around the feet, while a five-baffle hood keeps the down exactly where it's needed for maximum comfort.

The 100% recycled Supersoft 20D lining with fluorocarbon-free DWR provides breathability and durability, ensuring comfortable nights and a long lifespan. The full-length Gemini™ zip baffle minimises heat loss and is stiffened to prevent snagging. The Lode Lock™ closure and collar drawcords are easily adjusted, even in the dark.

Designed with a more generous GT Fit, the Helium GT keeps the tapered Alpine shape but offers a broader profile for extra comfort. A Good Night’s Sleep Temperature of -5°C (23°F) provides reliable warmth for backpacking and travel through spring and summer.

Features

• Lightweight, breathable HELIUM 20D recycled outer shell with FC-free DWR
• 449g of 90-10 Pure Duck Down (700 fill power)
• Roomy GT fit for comfortable sleeping positions
• Slanted box-wall baffles for even warmth
• Mid-level side seams for durability
• 5-baffle hood for head warmth
• 4-baffle foot box for foot insulation
• Full-length Gemini zip baffle with Lode Lock closure
• Supersoft 20D recycled lining with FC-free DWR
• Includes waterproof roll-top stuff-sack and storage cube

Specifications

Video

Technology

	Down Cycle The recycled Down Mountain Equipment comes from post-consumer goods, unwanted clothing and bedding collected by waste recycling companies.
	Down 700 Down is the finest insulator. Manmade insulations cannot match its warmth-to-weight ratio, compressibility, long lifespan, and softness. Duck Down is great for insulated clothing and equipment for all but the most serious expeditions.
	Helium Helium fabrics are exceptionally light, compressible, and soft. Their densely woven construction ensures the highest levels of down-proofing and wind resistance.
	Fair Wear Fair Wear ensures that the clothing is produced under high standards that promote ethical working conditions.