Product Overview: The Summit Trekker Envelope Sleeping Bag in Grey is a practical and reliable sleeping solution designed to meet the needs of outdoor enthusiasts across spring, summer, and autumn. With a comfortable rectangular (envelope-style) shape and thermal insulation, this sleeping bag provides ample room to move while maintaining warmth and breathability during overnight stays in mild to cool conditions.
Built with durable materials and packed with 150gsm thermal hollow fibre insulation, the Summit Trekker Envelope Sleeping Bag combines comfort, versatility, and compact portability—ideal for camping, festivals, caravanning, or emergency sleepovers.
Multi-Season Use: Designed to provide effective insulation and comfort across three seasons, the Trekker Envelope Sleeping Bag is suitable for spring, summer, and autumn conditions. It offers reliable thermal protection for various outdoor environments.
Thermal Hollow Fibre Insulation: The 150gsm hollow fibre filling helps trap body heat effectively while allowing for breathability, making it ideal for cooler nights without overheating during warmer evenings.
Soft Comfort Lining: The inner lining is made from a soft-touch polyester material, delivering a cozy sleeping experience that enhances comfort throughout the night.
Durable Outer Shell: Constructed with 170T polyester, the outer layer offers durability, light moisture resistance, and easy maintenance—ideal for repeated use on campsites or in travel settings.
Generous Sizing: With dimensions of 180cm x 75cm, the rectangular (envelope-style) shape offers ample room to move, making it especially suitable for those who prefer a less restrictive sleeping experience than mummy-style bags.
Efficient Temperature Rating:
Upper Limit (20°C): Appropriate for use in warm weather with ventilation.
Comfort (12°C): Ideal range for restful sleep during moderate nights.
Lower Limit (2°C): Suitable for colder conditions when paired with warm sleepwear or additional layers.
Compact and Lightweight: Weighing approximately 900g, the sleeping bag packs down into a manageable size, making it easy to carry in a backpack or camping kit without adding excess bulk.
Usage Tips
Optimize for Cooler Nights: For temperatures approaching the lower limit (2°C), use thermal underlayers or a sleeping mat to enhance insulation.
Air Out Between Uses: Unpack and air the sleeping bag after each use to maintain freshness and prolong the lifespan of the insulation.
Use a Sleeping Bag Liner: A liner can provide added warmth, improve hygiene, and reduce the need for frequent washing.
Ideal For
Weekend campers and caravaners
Festival-goers seeking affordable comfort
Youth group or scout trips
Spring and summer backpacking excursions
Indoor overnight stays or guest bedding
Customer Reviews
Darren M. – Verified Camper “Great value sleeping bag. I took it to a summer music festival and stayed warm throughout the night. Very comfortable and compact.”
Sophie K. – Family Camper “Perfect for our family camping trip. Light, packs down well, and the rectangular shape gave me more space to stretch out.”
Tom B. – Outdoor Hobbyist “Used this sleeping bag in the Lake District in early spring. Held up well against cooler temperatures and was easy to pack away. Recommended!”
Conclusion
The Summit Trekker Envelope Sleeping Bag – Grey is a well-rounded, dependable sleeping solution tailored for multi-season use. With a spacious design, quality insulation, and easy portability, it’s perfect for anyone who enjoys outdoor activities and needs a comfortable, affordable sleeping bag that won’t weigh them down. Whether you’re camping in the countryside or gearing up for festival season, the Summit Trekker has you covered.
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