Sleeping bag VAUDE Sioux 400 II S adult mummy, recycled polyester, 2000×750 mm, max user height 170 cm, blue

VAUDE Sioux 400 II S adult mummy sleeping bag in blue is a lightweight, packable two-season sleeping bag designed for users up to 170 cm tall. Constructed mainly from recycled polyester with Sensofiber Eco synthetic insulation, it uses a single-layer fill and a form-fitting mummy shape to balance low weight, compactness and thermal efficiency. The shell has a PFC-free Eco Finish for water repellency and dirt resistance, and the fabric meets bluesign® criteria. The sleeping bag includes a contoured hood, footbox and a long side zip with a double-slide, dividable zipper that allows connection with compatible bags. A compression stuff sack is supplied for compact transport.

Advantages

The single-layer synthetic fill provides quick-drying insulation that retains heat even when damp, while keeping weight and volume low for backpacking and hut-to-hut tours. The mummy cut and contoured hood reduce dead air space for better thermal efficiency, and the two-way zipper enables controlled ventilation. Materials are climate-conscious: both shell and insulation are made from recycled polyester, reducing energy use and CO2 emissions compared with virgin fibers. The outer fabric is treated with a PFC-free finish for water repellency and the blend of durable, easy-care fabrics ensures long service life and simple maintenance.

Suitable for

• Backpacking and multi-day trekking in late spring to early autumn
• Lightweight camping and hut-to-hut tours
• Overnight outdoor trips where compact storage and low weight are priorities
• Summer and mild-climate overnight use where quick-drying insulation is beneficial

Key specifications

• Shape: mummy (form-fitting) for efficient heat retention
• Fill type: single-layer synthetic fill (Sensofiber Eco) made from recycled polyester
• Shell and lining: high-quality recycled polyester with PFC-free Eco Finish
• Temperature seasonality: 2-season (late spring to early autumn)
• Dimensions: length 2000 mm, width 750 mm
• Maximum recommended user height: 170 cm
• Packing size (approx.): 350 mm × 200 mm when compressed in supplied sack
• Features: contoured hood, footbox, inner pocket, long side zip with double-slide dividable zipper
• Certification/standard: fabric complies with bluesign® system criteria

How to use

Use the VAUDE Sioux 400 II S as your primary sleeping system for two-season trips where low weight and compact packing matter. Fully open the long side zipper to ventilate on warmer nights or to use the bag as a quilt. Zip up and adjust the contoured hood to retain warmth during colder periods. Store dry and ventilated after use; if wet, air dry completely before packing. Use the included compression sack to reduce volume for transport and stow the bag loosely at home to preserve loft.

Usage recommendations

For best thermal performance and hygiene, use a lightweight liner compatible with the bag’s mummy shape and keep the inner pocket for small essentials. Avoid prolonged exposure to heavy rain; the PFC-free Eco Finish provides water repellency but is not a substitute for a waterproof bivy or shelter. Repair small tears promptly to maintain insulation and prolong product life.