Best all-rounder1 / 5
Images: Survive Outdoors Longer and its retailers. Used for product identification.
Survive Outdoors Longer
SOL Emergency Bivvy
The benchmark reflective bivvy: sealed seams, 90% heat return, and a rescue whistle.
- Weight
- 108 g
- Thermal
- High reflective
- Packed
- 13 × 8 × 2 cm
Best price found
£19.99
at Needle Sports · In stock
Prices checked 31 October 2026. We may earn a commission on these links.
- Waterproof
- Windproof
- Heat reflective
- Whistle included
- Reusable
Specifications
- Weight
- 108 g (120 g with stuff sack)
- Packed size
- 13 × 8 × 2 cm
- Material
- Heat-reflective polyethylene, heat-sealed seams
- Thermal claim
- Reflects 90% of body heat
- Open size
- 213 × 91 cm
Pros & cons
- Sealed seams keep rain and wind out
- Tear-resistant enough to reuse
- Rescue whistle and tinder cord included
- Non-breathable, so expect condensation
- Narrow for broad shoulders
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2 photosBest value reflectiveLifesystems
Lifesystems Heatshield Thermal Bag
DofE-recommended metallised bag that packs smaller than a drinks can.
- Weight
- 110 g
- Thermal
- High reflective
- Packed
- 7 × 6 × 6 cm
- Waterproof
- Windproof
- Heat reflective
- Taped seams
Full specs, 3 retailers →View DealFrom
£10.95
at Cotswold Outdoor
10 photosBest for twoLifesystems
Lifesystems Survival Bag
The heavy-duty orange polythene bag every UK mountain leader carries.
- Weight
- 290 g
- Thermal
- Barrier only
- Packed
- 10 × 18 × 3 cm
- Waterproof
- Windproof
- Fits 2 people
- Reusable
Full specs, 3 retailers →View DealFrom
£5.99
at Cotswold Outdoor
3 photosLightestRab
Rab Ark Emergency Bivi
The lightest bag on test from a British mountaineering brand.
- Weight
- 105 g
- Thermal
- Reflective
- Packed
- 12 × 6 cm
- Waterproof
- Windproof
- Heat reflective
- Taped seams
Full specs, 2 retailers →View DealFrom
£18
at Rab
