The idea is to hold all the necessary insulin supplies, including the meter and test strips. Gel packs from the 0 F freezer are put into a pouch next to the insulin. I don't know why the insulin doesn't freeze, but it doesn't. It seems to be the best product of its type available, but nonetheless it could be a lot better. The organizer uses clear "sticky" plastic for several of the pouches, and they are difficult to use, resisting putting things in and taking them out. Mesh would be much better. The pouches are really too small for standard 1 cc syringes; they can be used, but only with difficulty. The insulin side of the case is difficult to zip when the gel packs are in place. It's the right idea, but needs redesign. There are no instructions as to what is supposed to go where, but that can be figured out.