A waterproof raincoat is a shell whose purpose is to block the rain.
A long jacket that is waterproof...
Shell
Mackintosh A+
anorak raincoat!
http://www.enotes.com/how-products-encyclopedia/raincoat
Charles Macintosh invented the waterproof coat in 1824
Plastic is easy to mould into garments, and is waterproof.
A "waterproof cloak" or "raincoat" in Spanish is "impermeable". It is pronounced "eem-pare-may-AH-blay". Please see this site for confirmation of the translation: http://www.answers.com/library/Translations
winter knits, watch, wrap, wetsuit, waterproof raincoat
raincoat, umbrella, stay inside, waterproof clothings and shoes.
Gore-tex
mac
You can't use a property, as it's a description of something a substance does. A better question would be to ask 'What are the properties you would look for in a material to be used for a raincoat?' You'd want it to be waterproof, flexible, hard wearing and comfortable.
No, raincoats can't be made of silk or wool. The main function of a raincoat is that it is waterproof, so rain slides right off without the person wearing the coat getting wet. Silk and wool are not waterproof.
The raincoat was invented in 1823. It was invented by Charles Macintosh, and the first raincoats were called Macintosh coats, which were developed in Glasgow, Scotland.