What worsted yarn means?

medium weight yarn

What is the most durable wool?

Melton: One of the toughest and warmest wools available, Melton contains thick wool fibers and is typically woven into a twill weave. Melton is relatively wind-resistant and good at water-wicking, making it one of the more weatherproof wools and a prime choice for woolen outerwear and heavy blankets.

Is cashmere wool?

Cashmere is a type of wool that is made from cashmere goats and pashmina goats. The old spelling of cashmere is Kashmir, which is a region in Northern India that still produces cashmere. Cashmere is a natural fiber known for its extremely soft feel and insulating properties.