Boiled wool is a special type of fabric

Fabric

A fabric is a textile material, short for "textile fabric".Fabric may also refer to:*Fabric , the spatial and geometric configuration of elements within a rock*Fabric , a nightclub in London, England...

 primarily used in beret

Beret

A beret is a soft, round, flat-crowned hat, designated a "cap", usually of woven, hand-knitted wool, crocheted cotton, or wool felt, or acrylic fiber....

s, scarves

Scarf

A scarf is a piece of fabric worn around the neck, or near the head or around the waist for warmth, cleanliness, fashion or for religious reasons. They can come in a variety of different colours.-History:...

, vest

Vest

A vest is a garment covering the upper body. The term has different meanings around the world:Waistcoat :. This is called a waistcoat in the UK and many Commonwealth countries, or a vest in the US and Canada. It is often worn as part of formal attire, or as the third piece of a lounge...

s, cardigan

Cardigan (sweater)

A cardigan is a type of machine- or hand-knitted sweater that ties, buttons or zips down the front; by contrast, a pullover does not open in front but must be "pulled over" the head to be worn. The cardigan was named after James Brudenell, 7th Earl of Cardigan, a British military commander,...

s, coat

Coat (clothing)

A coat is a long garment worn by both men and women, for warmth or fashion. Coats typically have long sleeves and are open down the front, closing by means of buttons, zippers, hook-and-loop fasteners, toggles, a belt, or a combination of some of these...

s and jacket

Jacket

A jacket is a hip- or waist-length garment for the upper body. A jacket typically has sleeves, and fastens in the front. A jacket is generally lighter, tighter-fitting, and less insulating than a coat, which is outerwear...

s. It is created using a mechanical knitting

Knitting

Knitting is a method by which thread or yarn may be turned into cloth or other fine crafts. Knitted fabric consists of consecutive rows of loops, called stitches. As each row progresses, a new loop is pulled through an existing loop. The active stitches are held on a needle until another loop can...

 process which involves a set pattern that is then shrunk. It can also be a woven fabric which is shrunk, compressing the fibres together.

Origins

Wool felt

Felt

Felt is a non-woven cloth that is produced by matting, condensing and pressing woollen fibres. While some types of felt are very soft, some are tough enough to form construction materials. Felt can be of any colour, and made into any shape or size....

 and felted wool are similar to boiled wool, all of these processes date back to at least the Middle Ages

Middle Ages

The Middle Ages is a periodization of European history from the 5th century to the 15th century. The Middle Ages follows the fall of the Western Roman Empire in 476 and precedes the Early Modern Era. It is the middle period of a three-period division of Western history: Classic, Medieval and Modern...

. The word felt itself comes from West Germanic feltaz.

Process

Wool felt is created commercially and results in uniform fabric thickness. Felted wool is created by first weaving wool to create an item then washing it, resulting in a solid, dense fabric that is about 30% smaller than the original woven material. Boiled wool is produced industrially and is characteristically found in Tyrolean textiles of Austria

Austria

Austria , officially the Republic of Austria , is a landlocked country of roughly 8.4 million people in Central Europe. It is bordered by the Czech Republic and Germany to the north, Slovakia and Hungary to the east, Slovenia and Italy to the south, and Switzerland and Liechtenstein to the...

 and of South America

South America

South America is a continent situated in the Western Hemisphere, mostly in the Southern Hemisphere, with a relatively small portion in the Northern Hemisphere. The continent is also considered a subcontinent of the Americas. It is bordered on the west by the Pacific Ocean and on the north and east...

.

Very large woven sheets of wool fabric are first either dyed or not, with a design on them. These are boiled and shrunk without using any chemicals. Because of this and other factors, boiled wool is a close fabric, very warm, windproof and usually does not itch.