1. Neoprene is a synthetic rubber foam with a delicate, soft and elastic feel. It is shockproof, heat-insulating, elastic, waterproof and airtight. This lens bag is made of high-grade neoprene, which is more convenient to carry than a hard lens barrel and saves space in a suitcase or other bag. It comes with a hook and a belt, which is convenient for hanging on other bags or wearing on a belt, and it is convenient to change lenses. 2. This is a universal lens bag. No matter what brand of lens, as long as the size is similar, it can be loaded. However, it cannot be loaded with large-diameter lens hoods, lens brackets and other large accessories. 3. Since the micro-single lenses on the market are generally small, this lens bag for micro-single lenses is generally large. Please refer to the internal dimensions of the lens bag for specific considerations.Specifications and dimensions of neoprene lens bag (sleeve/tube):Small (S): 8cm in diameter, 10cm in length, can hold a total length of no more than 7cm, and a diameter of no more than 8cmMedium (M): 9.5cm in diameter, 14cm in length, can hold a total length of no more than 11cm, and a diameter of no more than 9cmLarge (L): 10cm in diameter, 18cm in length, can hold a total length of no more than 15cm, and a diameter of no more than 10cmXL: 10cm in diameter, 24cm in length, can hold a total length of no more than 22cm, and a diameter of no more than 10cm.Packaging: 4 neoprene lens bags. (One S, one M, one L, one XL)