I saw the thread on inflatable reentry. How about a blow up bag with a airlock is inflated. I do not intend for a crew to risk there lives to a bag. But as a first step in building . I hope there are composite materials that can be applied to the inside of the bag to give the proper protection to equipment and crew. I would think equipment would not be placed next to outer walls so small hole could be found and fixed. This seems a simple idea so I assume it has ben looked into but I have not seen it.