Mountain Equipment Helium 400 Sleeping Bag - LZ

Mountain Equipment Helium 400 sleeping bag for lighter nights out

A lightweight down sleeping bag with recycled fabrics and PFC-free DWR, built for dependable three-season-style use where low pack weight matters.

The Helium 400 is a down sleeping bag from Mountain Equipment that combines recycled outer and inner fabrics with a 90/10 duck down and duck feather fill. It is built around a 20D shell and lining, both made from 100% recycled polyamide with PFC-free DWR, so the materials are chosen with packability and weather resistance in mind.

Materials and fill

• Outer fabric uses Helium 20D 100% recycled polyamide at 34 g/m² with PFC-free DWR
• Inner fabric uses Supersoft 20D 100% recycled polyamide at 37 g/m² with PFC-free DWR
• Filled with 90/10 duck down and duck feathers
• Fill power is at least 700 cuin
• Filling weight is 403 g

What to expect

Temperature specifications are provided according to EN13537, which gives you a standardised reference point when comparing it with other sleeping bags. The listed left zip version is the one covered by this product page.

For anyone choosing a sleeping bag on the basis of materials, fill quality and a cleaner fabric treatment, this model keeps the focus on those core details without unnecessary extras.