BISINNA mummy sleeping bag for adults, Gray 3.9lbs. 7ft, 400g/m² synthetic down, water-resistant

The BISINNA Mummy Sleeping Bag is a 7-foot, 3–4-season adult sleeping bag built from water-resistant 40D nylon with 400g/m² synthetic down for roomy warmth and compact portability.

Designed for hikers, campers and anyone needing dependable overnight warmth, this BISINNA sleeping bag blends weather-ready fabrics with a generous fit and travel-friendly packing. It pairs a soft 210T pongee lining with a DWR-treated shell and a high-fill synthetic insulation to approximate the warmth of down while staying easier to care for. The full-length features—an adjustable hood, insulated draft tube and two-way anti-snag zipper—let you control ventilation without losing heat.

How warm is this sleeping bag for cool nights?

The BISINNA model uses 400g/m² synthetic down and an insulated draft tube to hold body heat in colder conditions. The hood seal and snug mummy shape reduce heat loss, making it suitable across three to four seasons depending on layering and shelter.

• 400g/m² synthetic down fill for consistent loft and insulation.
• Insulated draft tube along the zipper to block wind.
• Adjustable drawstring hood to minimize heat escape around the head.
• Mummy cut concentrates warmth where you need it most.

Will it fit tall adults and different sleeping positions?

This sleeping bag stretches to a full 7 feet, accommodating users up to about 6'1" with extra shoulder room and an expandable footbox. While optimized for a semi-fitted mummy profile, the stretchable foot area and added shoulder width allow for some movement and side sleeping.

• 7-foot length supports taller users and added comfort.
• Generous shoulder space to reduce constriction while turning.
• Stretchable footbox prevents toes from feeling cramped.
• Suitable for adults, teens and family-shared trips.

How easy is it to carry and care for on multi-day trips?

Weighing about 1.8 kg, the sleeping bag compresses into a 15.7×11 inch package that fits into the provided compression sack for backpacking and easy storage. The included mesh storage bag helps preserve loft between uses, and the fabric and synthetic fill are machine-washable for simple cleaning.

• Lightweight 1.8 kg construction for backpack compatibility.
• Compresses to 15.7×11 inches using the supplied sack.
• Bonus mesh storage bag maintains loft during storage.
• Machine-washable materials for straightforward upkeep.

What practical features make nights more comfortable?

Small design choices improve usability: a YKK two-way zipper with anti-snag protection lets you ventilate from the foot or torso, and the DWR outer keeps light moisture from soaking the insulation. The soft pongee lining adds next-to-skin comfort for restless sleepers and those who prefer sleeping without extra liners.

• YKK 2-way zipper with anti-snag for reliable opening and closing.
• DWR-coated 40D nylon shell repels damp conditions.
• Soft 210T pongee interior for skin-friendly comfort.
• Full-length zippers enable temperature control at night.

Who this is for: Adventurers who want a roomy yet packable sleeping bag that balances warmth, comfort and easy care will appreciate the BISINNA Mummy Sleeping Bag. It’s a strong option for backpackers seeking a compressible sleep system, campers wanting extra length and shoulder space, festival-goers needing reliable overnight shelter, and households preparing a versatile spare bed for guests or emergency kits. Avoid using it as a substitute for specialized cold-weather mountaineering bags; instead, treat it as a durable, all-purpose three- to four-season bag for most outdoor and travel situations.