A nano meter is a unit of  length in the metric system, equal to billionth of a meter (10).

Technology  is the making ,usage and knowledge of making tools, machines and techniques ,in order to solve a problem or perform a specific function.

Nanotechnology  is the study of manipulating matter on an  atomic scale.

Nanomaterials in textiles have proved to be immensely valuable for the manufacturing of protective garments for workers involved in emergency services such as military personnel, firefighters and medical workers.

There are different methods for the production of nanoengineered textiles. For example, sometimes synthesized nanoparticles are incorporated into the fibers or textiles.

Nanoparticles are also applied as a coating on the surface of the finished product.  There are also different coating techniques such as sol-gel, plasma polymerization and layer-by-layer that are used in the application of nanoparticles onto textile fibers.

These techniques can enhance durability and are also capable of making the fabric resistant to extreme weather conditions. The composition of nanocoating materials, such as surfactants and carrier medium, can alter the surface texture of fabrics.  

Nanotechnology materials advantages  are:

Lighter

Faster

Stronger

Smarter

Safer

Cleaner

Even more precise.

Nanotechnology materials disadvantages are:

Very expensive

Hard to create

Single molecule of powder or dust can damage the whole thing.

APPLICATIONS

Antiwrinkle cotton fabric

Odor-free fabric

Water-resistant fabric

Ultraviolet-protective fabric

References

https://www.azonano.com/article.aspx?ArticleID=5501