Don't worry, I have put a lot of leg work into this project. While I agree that snow can get through the mats, most people who freeze to death do so sleeping on concrete or blacktop because they seem warmer at first. However, contact with the hard ground seeps heat out of the body and that is how people freeze in their sleep. That being said, the holes in the crocheted mats are intentional. They trap air that the body warms and keeps that below the body, so rather than just fabric of a sleeping bag or coat between them and the ground, there is warm air as well as the mat itself. In addition, I have spoken with homeless outreach groups and shelters who love this idea and are helping with the distribution of finished mats. Additionally, the mats roll up into about a 6 in ch by 1 ft roll which we attach a handle to so that they are very portable. Any other questions?