As far as I know. as of 2021. the date of the October update. Apple has not yet launched or officially announced the iPhone. so it is unclear what material it will be made of. It is usually made of a combination of glass and aluminum or stainless steel in the iPhone design.

MVS yarn, or Murata Vortex Spinning yarn, is a type of yarn spun through a sophisticated technology developed by Murata Machinery, Ltd. Unlike conventional ring spinning, MVS technology efficiently integrates air vortex to twist the fibers, which greatly enhances the yarn's strength and uniformity. This process results in a product that exhibits less hairiness, improved seam strength, and a more comfortable fabric feel. MVS yarns are often used in the manufacturing of high-quality apparel and textiles, offering manufacturers the dual benefits of durability and softness. They are suited for a wide range of applications, from casual wear to professional attire, making them a preferred choice for textile producers aiming for top-tier product quality.

Polypropylene is known for its chemical resistance, which includes resistance to bleach. Typically, bleach, a common household cleaner and disinfectant, does not damage polypropylene under normal use conditions. This makes polypropylene a popular choice for containers and products that require regular cleaning or exposure to disinfectants. However, it's essential to consider concentration and exposure time. Highly concentrated bleach or prolonged exposure could potentially affect the surface quality or color of polypropylene items, though structural integrity is usually not compromised. For practical purposes, using diluted bleach solutions for short periods should be safe for cleaning polypropylene items. Always refer to the manufacturer's cleaning recommendations for specific products.