Nitestar Alpha 350 Sleeping Bag Excalibur

The Vango Nitestar Alpha 350 sits in that useful middle ground where proper warmth meets reasonable pack weight. It's built around Alpha insulation, which blends standard polyester with siliconised hollow fibres that trap air both between and within the fibres themselves. That siliconised coating does two things worth having: stops the fill from clumping after you've stuffed it into its bag dozens of times, and adds some water resistance when condensation builds up inside your tent overnight. The offset construction layers the shell and lining with staggered stitching, so you don't get cold lines running across your back at 3am when temperatures drop. It carries ISO 23537-1:2022 certification, which means the comfort rating of -1°C and limit rating of -7°C have been lab-tested rather than guessed at. The mummy taper cuts down on dead air space your body would otherwise need to heat, while the 3D hood shapes around your head rather than just cinching flat. There's an insulated shoulder baffle with drawcords for sealing everything up tight, and the two-way auto-lock zip lets you crack open the foot section for ventilation without the whole bag unzipping itself while you sleep. Small details like the internal pocket for your phone, zip guards that prevent snagging, and hanging loops for airing it out make regular use more straightforward. The outer Polair Hex fabric is 68D polyester with an embossed finish that stands up to abrasion from tent groundsheets and rucksack bases. Inside you get 190T brushed polyester microfibre that feels soft without being slippery. At 1.93kg it's manageable for backpacking trips, and it's on the Duke of Edinburgh's Award Recommended Kit list because it handles multi-day expeditions where weight and reliability matter. This synthetic bag retains warmth even when damp, dries faster than down, and needs less careful handling. The suggested usage range of -5°C to 18°C covers spring through autumn camping in the UK, plus summer wild camping trips when nighttime temperatures drop. It's a practical three-season bag that does what it says without fuss. FEATURES • Polair® Hex Fabric - A strong, durable yet soft touch 68D polyester shell fabric with an embossed hex grid finish. • Polair® Fabric Lining - A super soft and comfortable 190T brushed polyester microfibre lining that's incredibly warm and soft to touch • Alpha Insulation - A lightweight 50/50 blend of polyester and siliconised hollow fibres that trap more air between and within the fibres to increase warmth retention whilst retaining compressibility. A siliconised coating reduces friction to prevent insulation clumping and increases water repellence. • Offset Construction - A double layer design that offsets the shell and lining stitching to reduce cold spots and increase warmth retention. • Mummy Shaped Sleeping Bag - Tapers from the shoulders to the foot, reducing pack size and increasing thermal efficiency • 3D Hood - Anatomically shaped to provide greater comfort and reduce heat loss. A convenient drawcord closure allows for flexible adjustment in varying temperatures. • Horizontal Stitching - Evenly spaced to hold insulation in place and ensure even distribution throughout • Insulated Shoulder Baffle - Helps retain heat within the sleeping bag. A convenient drawcord closure allows for flexible adjustment in varying temperatures. • Zip Guard with Anti-Catch Piping - Helps to prevent the zip from snagging on the lining, allowing easy opening and closing • Insulated Zip Baffle - Prevents heat from escaping along the zip, reducing cold spots within the sleeping bag. • Auto-Lock Two-Way Zip - Seals in warmth and provides adjustable ventilation. Auto-lock prevents the bag from opening during the night and can be accessed from inside the bag • Woven Zip Puller - Allows you to quickly and easily move the zip • Internal Pocket - Provides convenient storage for small items • Hanging Loops - Allows you to easily hang your bag for quick and easy drying • ISO 23537-1:2022 Certified - Extensively tested to meet industry standard temperature ratings SPECIFICATIONS • Weight : 1.93 kg • EN13537 Comfort : -1 °C • EN13537 Extreme : -25 °C • EN13537 Limit : -7 °C • Suggested Usage Max : 18 °C • Suggested Usage Min : -5 °C • External Chest Width : 85 cm • External Foot Width : 50 cm • External Length : 210 cm • Maximum User Height : 190 cm • Internal Chest Width : 83 cm • Internal Foot Width : 48 cm • Sleeping Bag Shape : Mummy • Performance : 3-4 Season • Fill Type : Insulite Alpha • TOG Rating : 10.5 • EAN : 5059474017101 • Colourway : Excalibur