Hi Chris, the two shelters you see are the Mountain Laurel Designs (MLD) Solomid and the Duomid shelters, they are made from Cuben Fibre and only weigh a few hundred grams, they basically work by pegging out the 4 corners and then using your walking pole up into the top centre. I have had them out in pretty severe wind, when other proper tents collapsed and the duomid was still standing just fine. The duomid has tons of room and is single skin, it also has a midgie net all around the bottom and at the top of the vent hole. Brilliant shelter, but as youd expect its not cheap, but does what it says on the tin, hope this helps mate.