skin or leather
The Arrow Quiver of the Iceman Reconstruction Attempts and the Special Significance of the Fur Material
The Construction of a Skin-on-Frame Canoe at Kierikki Stone Age Centre, Finland, as a Medium for Group Training in Ancient Skills and Experiential Learning
Tanned skin of an animal, for example as used for clothing.
Absolutely, textiles are already known from the Stone Age. In these areas, little is found (in sandy soils, this is not preserved that well), but there are many clues, like weaving weights, belts and pins et cetera. The surely still used animal furs but textile was in well use. The value of it was much more than today, however...