A simple but waterproof and breathable bivy cover for lightweight camping.
Bivi bags are not the preserve of scummy alpinists or even those of a more tactical nature. They can add a useful layer of protection for almost any user, particularly if you intend to sleep out in damp conditions that will put even the most expensive down sleeping bag to the test.
We had two constraints; firstly minimize the amount of fabric to keep weight and price low, and secondly we should be able to fit inside an AD900 without squashing the down. We have spent a great deal of time resolving these issues to produce an efficient pattern with little waste, whilst still designing a bivi bag that works. A simple, affordable but properly waterproof / breathable bivi cover weighing 400g. We hope you like it.

The Hunka bivvy bag has been awarded a Gold Seal by SingleTrack mag and has recently been voted as Best Software Product.
| Model | Weight (gr) | RRP (£) | Deals | |
| Alpkit Hunka | 388 | 30 | Alpkit.com | |
| Macpac Alpine Cocoon | 600 | 105 | 105 | The Outdoor Shop |
| Mountain Equipment Ion Bivi | 280 | 80 | 71.99 | Wiggle |
| Rab Ranger Bivi | 570 | 140 | Jackson Sports | |
| Terra Nova Discovery Lite Bivy Bag | 450 | 109.99 | Nevisport | |
| Rab Survial Zone | 420 | £50.00 | £45 | Backpacking Light |
| Blizzard Survival Bag | 385 | 29 | Blizzard Survival | |
| Delta Bivi Bag | 410 | 105 | Phd Designs | |
| Black Diamond Winter Bivi | 277 | 100 | Complete Outdoors | |
| Snugpak Code Green Bivvy | 340 | 59.95 | Surplus and Adventure | |