Vango Mantis 300 Sleeping Bag
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Shipping Information
Free UK Delivery*
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Description
Description
Lightweight 3 Season ThermX Mummy Sleeping Bag
The Vango Mantis 300 is a lightweight and highly compressible 3 season sleeping bag featuring advanced ThermX insulation technology for improved warmth-to-weight performance during camping, trekking and expedition use.

Key Features
- ThermX Insulation Design - Proprietary construction targets warmth where it is needed most for improved thermal efficiency
- Thermal Reverb Technology - Aluminised fabric layers reflect body heat back towards the user for enhanced warmth retention
- Thermal Embrace System - Elasticated lining gently contours closer to the body to reduce cold spots without restricting movement
- Lightweight Recycled Ripstop Fabrics - Durable 40D Polair Eco shell and lining fabrics remain breathable, water resistant and compressible
- Omega Ergonomic Shaping - Tailored mummy design improves heat retention around the head and shoulders
- 2 Panel 3D Hood - Ergonomically shaped hood helps minimise heat loss from the head
- Adjustable Shoulder Baffle - Insulated ergonomic shoulder baffle helps retain warmth inside the bag
- Arrow Foot 2.0 Footbox - Redesigned ergonomic footbox improves comfort while reducing heat loss
- Full Length Two-Way Auto-Lock Zip - Allows adjustable ventilation with anti-snag zip guard protection
- 3 Strap Compression Stuff Sack - Reduces pack size for efficient transport and storage
Product Overview
The Vango Mantis 300 Sleeping Bag is designed for users who require lightweight warmth, packability and dependable 3 season performance across camping, trekking and expedition environments. Featuring Vango’s advanced ThermX insulation system, the bag focuses warmth where it is needed most to improve thermal efficiency without unnecessary bulk.
Its lightweight recycled 40 denier ripstop nylon shell fabric balances durability, breathability and water resistance, while the soft-touch lining fabric remains highly compressible for reduced pack size. Thermal Reverb technology uses strategically placed aluminised layers to reflect body heat back towards the user, increasing warmth retention during colder nights.
The Thermal Embrace system uses elasticated lining threads to gently contour the sleeping bag around the body, reducing cold air gaps while still allowing natural movement during sleep. Combined with Omega ergonomic shaping around the head and shoulders, this helps maximise thermal efficiency throughout the bag.
A redesigned Arrow Foot 2.0 ergonomic footbox improves comfort and flexibility at the feet while minimising heat loss. Additional cold-weather performance comes from the insulated shoulder baffle, insulated zip baffle and shaped 3D hood.
The full-length two-way auto-lock zip allows easy ventilation adjustment from inside the bag, while anti-catch piping helps prevent snagging during use. An internal storage pocket provides convenient access to smaller essentials overnight.
Certified to ISO 23537-1:2022 temperature testing standards and supplied with a lightweight 3-strap compression stuff sack, the Vango Mantis 300 delivers excellent warmth-to-weight performance for a wide range of outdoor adventures.
Intended Uses
- Camping & Outdoor Adventures - Lightweight 3 season sleeping bag for campsite and outdoor use
- Backpacking & Trekking - Compressible low-bulk design for pack-efficient travel
- DofE Expeditions - DofE recommended sleeping bag suitable for expedition use
- Wild Camping - Reliable warmth and compact transport for remote overnights
- Multi-Day Outdoor Trips - Comfortable mummy bag for extended outdoor use
Specifications
| Brand | Vango |
| Product Name | Mantis 300 Sleeping Bag |
| Product Type | 3 Season Mummy Sleeping Bag |
| Season Rating | 3 Season |
| Weight | 1.34kg |
| Shape | Mummy |
| Zip Side | Left |
| Comfort Rating | 3°C |
| Limit Rating | -1°C |
| Extreme Rating | -12°C |
| Suggested Usage Range | -1°C to 20°C |
| Max User Height | 190cm |
| Internal Length | 205cm |
| Internal Chest Width | 78cm |
| Internal Foot Width | 48cm |
| External Chest Width | 80cm |
| Fill Type | 4T Eco Recycled Synthetic Filling |
| Certification | ISO 23537-1:2022 Certified |
| DofE Recommended | Yes |
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