Vango Nitestar Alpha 450 Sleeping Bag

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  Product Description
The Vango Nitestar Alpha 450 sleeping bag balances warmth and packability through its Alpha insulation system - a 50/50 blend of polyester and siliconised hollow fibres that trap air both between and within the fibres themselves. This construction approach means you're getting a proper three-season bag that compresses down small enough for backpacking trips without sacrificing comfort when temperatures drop. The mummy shape tapers from shoulders to feet, which is standard design but works well for heat retention, and the offset double-layer construction prevents cold spots by staggering the stitching lines between shell and lining. It's ISO 23537-1:2022 certified, so the temperature ratings are tested rather than guessed.

The fabric choices are practical rather than fancy. You've got a 68D polyester outer with Vango's Polair Hex finish - it's durable enough for rough ground and has a slightly embossed texture. Inside there's a 190T brushed polyester microfibre lining that feels soft without being overly delicate. The two-way auto-lock zip runs smoothly thanks to anti-catch piping, and there's an insulated baffle running the length of it to stop heat escaping through the zipper track. The 3D hood shapes around your head with a drawcord adjustment, and there's an insulated shoulder baffle you can cinch down when it gets properly cold. An internal pocket holds your phone or headtorch, and hanging loops let you air it out properly between trips.

Designed to withstand the demands of Duke of Edinburgh expeditions, this sleeping bag delivers the toughness needed for multi-day youth adventures where kit gets seriously tested. Sitting at the heart of Vango’s Nitestar Alpha range, the 450 model offers reliable comfort and warmth for shoulder-season trips and cooler nights. Its horizontal stitch pattern helps maintain even insulation distribution, while the siliconised hollow fibres resist clumping, even after repeated use and compression. Though synthetic fill takes up a little more pack space than down, it performs consistently in damp or changeable conditions—making it a dependable choice when the weather can’t be trusted.

Vango Nitestar Alpha 450 Sleeping Bag 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 : 2.25 kg
  • EN13537 Comfort : -4 °C
  • EN13537 Extreme : -31 °C
  • EN13537 Limit : -11 °C
  • Suggested Usage Max : 15 °C
  • Suggested Usage Min : -9 °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 : 4 Season
  • Fill Type : Insulite Alpha
  • TOG Rating : 11
  • EAN : 5059474017118
  • Colourway : Winery

Frequently Asked Questions


What temperature rating does the Vango Nitestar Alpha 450 have?
The Nitestar Alpha 450 is ISO 23537-1:2022 certified, which means its temperature ratings have been independently tested to meet industry standards. The specific comfort and limit temperatures will be marked on the bag's label. As a three-season bag positioned in the middle of Vango's range, it's designed for spring through autumn camping in UK conditions, handling cooler nights reliably while remaining packable enough for backpacking trips.
How does Alpha insulation compare to down filling in sleeping bags?
Alpha insulation is a synthetic blend of polyester and siliconised hollow fibres that continues insulating when damp, whereas down loses most of its warmth when wet. Synthetic bags like the Nitestar Alpha 450 pack larger than equivalent down bags but cost less and dry faster. The siliconised coating on the hollow fibres prevents clumping and adds water repellence. For UK camping where condensation and damp conditions are common, synthetic insulation provides more reliable performance across varying weather.
Is the Vango Nitestar Alpha 450 suitable for Duke of Edinburgh expeditions?
Yes, the Nitestar Alpha range is part of the Duke of Edinburgh's Award Recommended Kit list. This means it meets the durability and performance requirements for multi-day youth expeditions. The 450 model provides adequate warmth for typical DofE expedition conditions in spring and summer months, with offset construction reducing cold spots and an insulated shoulder baffle for adjustable warmth retention on cooler nights.
What size does the Nitestar Alpha 450 pack down to?
Vango describes the Nitestar Alpha 450 as having brilliant compressibility for a synthetic sleeping bag, though exact packed dimensions aren't provided in standard specifications. The Alpha insulation system uses hollow fibres that compress more effectively than standard synthetic fills. As a three-season synthetic bag, it'll pack larger than down alternatives but smaller than budget synthetic bags. The compression characteristics make it practical for backpacking trips where pack space matters but you need reliable warmth.
How do you wash and care for the Vango Nitestar Alpha 450?
Synthetic sleeping bags like the Nitestar Alpha 450 can be machine washed on a gentle cycle with specialist sleeping bag cleaner or mild detergent. Use a large capacity machine to avoid compressing the bag too tightly during washing. Tumble dry on low heat or hang using the integrated hanging loops to air dry thoroughly. The siliconised coating on the Alpha insulation helps prevent fibre clumping during washing. Store uncompressed in a large storage sack rather than keeping it in its compression bag between trips to maintain loft.
What does offset construction mean in the Nitestar Alpha sleeping bag?
Offset construction uses a double-layer design where the stitching lines on the outer shell and inner lining are staggered rather than aligned. This prevents cold spots forming along seam lines because the inner layer's insulation covers the outer layer's stitched areas and vice versa. Combined with the horizontal stitching that holds insulation in place, this construction method increases overall warmth retention without adding significant weight to the sleeping bag.
Can you zip two Nitestar Alpha 450 sleeping bags together?
The product specifications don't mention zip compatibility for coupling two bags together. Vango sleeping bags sometimes offer left and right zip versions for pairing, but this isn't confirmed for the Nitestar Alpha 450 model. The two-way auto-lock zip allows ventilation adjustment from inside the bag and prevents accidental opening during sleep. If you need a double sleeping bag setup, check with the manufacturer about compatible zip configurations before purchasing two bags intending to connect them.
EAN-13 : 5059474017118
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If you’ve changed your mind about keeping your purchase, please return it in its original condition with proof of purchase and we’ll exchange or refund it. Unless faulty, this should be within 100 days of receiving your order. By original condition, we’d expect this to mean that you’ve kept packaging and labels, and that the item is undamaged and unused.

For further information of how to return your item, please visit the "Returning an Unwanted/Faulty/Damaged Item" section on our Help Page.
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