Soft Elastic Bands

Would anyone happen to know what material is used for the elastic band on headlamps. The kind I have in mind is a really soft elastic band that’s much more comfortable than the typical stuff I’ve found at the local fabric store. Is there a specific name for this material that I can search by? Thanks.

Elastic stretch webbing. My preferred supplier is Paiho: http://www.paiho.com/en_products_elastic.html