Sioux 400 II S synthetic fibre sleeping bag

Incl. VAT, plus shipping free delivery
Redesigned for circularity concepts that decrease waste and increase re-use and recycling.
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Short synthetic fill sleeping bag for hiking, trekking and travel

Green Shape
This environmentally friendly product bears the Green Shape label and is made of sustainable materials. watch video now
Grüner Knopf
This product bears the Grüner Knopf (Green Button). It's manufactured in accordance with government-certified environmental and social standards. learn more watch video now
Fair Wear Foundation
Our products are manufactured in a fair working environment in accordance with Fair Wear guidelines. learn more
Climate Neutral
This and all other VAUDE products are offset for climate neutrality. learn more
Suitable for
Hiking, Trekking
Spring / Autumn, All year
Material & Care
material overview
Dates & Details
Weight in g
minimal packing size in cm
22 x 20
maximum packing size in cm
35 x 20
temperature range
-11 °C
comfort temperature range
8 °C
temperature range limit
3 °C
filling weight in gqm
shoulder width in cm
foot width in cm
Length in cm
total weight in g
  • body contoured mummy cut for optimal heat management
  • contoured hood
  • inner pocket for essentials
  • footbox
  • long side zip down to the foot section
  • double slide, dividable zip fastener for connecting
  • exceptionally soft and skin-friendly fabric with bluesign® standard
  • Sensofiber fill for best sleeping comfort and insulation
  • Compression stuff sack included

Technologies and Materials

1-Layer Construction
1-Layer Construction – single-layer synthetic fiber fill
  • breathable, durable and easy to clean
  • dries quickly and insulates even when wet
  • used for ultralight and summer sleeping bags
Mummy – a design with high thermal efficiency
  • optimal thermal efficiency due to a form fitting shape
  • lightweight and very compressible
  • perfect for challenging tours in any weather
Recycled PET
Recycled PET: high quality polyester made from recycled PET bottles
  • high-quality polyester yarn made from recycled PET bottles
  • reduces energy consumption and CO2 emissions by up to 50 percent
  • climate-friendly and resource-efficient production
Recycled PET
VAUDE products REDESIGNED for circularity.
  • all parts include recycled polyester; parts that include other materials can be removed
  • resource-saving and efficient material cuts
  • robust, easily repairable and durable products
Sensofiber – easy care microfiber for cozy warmth
  • reduces heat loss and wicks away moisture
  • retains its insulating properties even when wet
  • easy to clean, quick-drying and durable
Sensofiber Eco
Sensofiber Eco – synthetic fiber insulation made from recycled polyester
  • made from 100% recycled plastic
  • high heat retention, dries quickly and is low–maintenance
  • climate-friendly and CO2-efficient production
Sensofiber Eco

Product description

  • 2-season (late spring to early fall)
  • form fitting mummy cut
  • made primarily from recycled polyester
Most of the time, you're going to be using your sleeping bag in summer. The single-layer synthetic fiber fill of the Sioux 400 S sleeping bag (for people up to 170 cm) cuts down on weight while still providing enough insulation for trekking and hut tours in moderate climates. The synthetic fill insulates even when wet and wicks moisture outward. The mummy shape and anatomic hood mean you can rely on efficient insulation, and the 2-way zip lets excess heat easily escape. The sleeping bag is also ideal for nights under the open sky: The outer shell of the Sioux 400 S synthetic fiber sleeping bag is treated with PFC-free Eco Finish for water repellency and dirt resistance. All in all, we've placed great emphasis on sustainability with this sleeping bag and it belongs to the VAUDE closed-loop concept. Both the main fabric and fill are made from 100% recycled polyester. It also features a material-efficient cut and is robust as well as easy to repair. The VAUDE Green Shape label stands for environmentally-friendly, functional products made from sustainable materials.
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