This is the standard for shipping snakes and lizards. Great soft bag to keep the animal safe during shipping. Draw string or attached material to wrap around and tie around the bag to to securely tie it closed. Blue stiching so you can see it is sewn at all the seams. Breeders choice for shipping small to medium reptiles. The 8x12 bag has a draw string closure while the 12x20 & 15x20 bags come with attached material ties.