Average Weather in October at London Heathrow Airport United Kingdom. At London Heathrow Airport, the month of October is characterized by falling daily high temperatures, with daily highs decreasing by 7Â°F, from 63Â°F to 56Â°F over the course of the month, and rarely exceeding 70Â°F or dropping below 50Â°F.
Silk is a natural fabric where polyester is a synthetic. Silk is far more expensive than polyester not as durable and requires a bit more care. The absolute best way for you to know the difference is to go to a local highend clothes store and touch a silk and a polyester shirt.
Polyester is a category of polymers that contain the ester functional group in their main chain. As a specific material, it most commonly refers to a type called polyethylene terephthalate (PET). Polyesters include naturally occurring chemicals, such as in the cutin of plant cuticles, as well as synthetics through step-growth polymerization such as polybutyrate. Natural polyesters and a few synthetic ones are biodegradable, but most synthetic polyesters are not. This material is used very widely in clothing.