Ventile is a well tried material very popular in the UK. There is a simple reality marketers and customers both miss. NO material is going to magically perform 100% in all situations 100% of the time. And I frankly wouldn't want such a get up. I invision myself encumbered like a space walking astronaut with only a visor to appreciate his surroundings. I hold to a John Muir intimacy with nature. Geting a little uncomfortable is part of the experience. I also have a little voice in my ear that says O.K. let the woolly mammoths alone, weathers turning, back to the cave. Pilots call this TUC- time of usefull consciousness before you black out.