This is a black conch shell bag. The bag is for conch shells approximately 35cm to 38cm long, including the mouthpiece. The material is nylon, which is light, durable, and won't fade. It has a size adjustment string and a fall prevention string. It can also be processed into a pom-pom style as shown in the fifth photo. For a pom-pom with a radius of 3 cm, cut the string leaving about 3 cm and unravel it with a toothpick or similar tool. I think it's suitable for mountain climbing, so please use it for training. The conch shell in the photo is 36cm. This is a sale of the bag only.