Thanks for the good review Paul, I carry the AMK Bivvy as part of my Shelter Kit with the following items stuffed in the top of the nylon bag:

AMK 2 person Heatsheet, 20 metres of Glow-In-The-Dark Nylon Mason Twine, 2 metres of Brass Wire, Waterproof Match Case with Waterproof/Windproof Safety Matches and Striker, tinfoil wrapped Birthday Candle, Cotton Balls, Flint Rod and Hacksaw Striker, Paraffin Fire Starter Packet, Insect Repellent Towellette, 1 Litre ZipLoc Plastic Bag, and a small serrated folding knife.

I have never tried the Bivvy but the Heatsheet material it is made from is far tougher than I expected when used as the roof for a lean-to shelter.

This Shelter Kit then slides into a 400ml billy can made from the bottom of a SS water bottle.

Mike