Continental Race Road Tube

After trying several different brands of tubes, I now just buy Continental Race Road tubes. They seem to hold air from day to day better than some other brands and I don't have to constantly reattach the head of my air pump to get them to accept air. They also can be rolled up into a small space ( I put talc on them and put them in a baggie in my saddle bag for emergency use) without twisting up like some other brands. While racers might prefer a different brand or a different model from Continental, these work fine for me.