In fact, most of us know only one variety of silk, mulberry. There are several others. Silk is a natural protein fibre that, after some processing and preparation, can be woven into fabric. Several insects and plants produce such fibre; but mainly it is the one produced by (moth) caterpillars that comes to mind when someone mentions silk.
The caterpillar cocoons itself in the fibre that it spins; and leaves it behind after its metamorphosis into a moth. The fact that the yarn is produced only after caterpillar’s transformation (and escape) as a moth appeals to many people; and gives marketers a pretext to label Eri as Ahimsa silk or peace silk. (In our team this is still being debated).
Eri makes up for its humbler history by care it requires in spinning and weaving. However, it is worth the care. The woven fabric is soft (it gets even softer with use), durable (fabled to last generations) and easy to wash (we wash our scarves with hand using a soft detergent; sometimes we even put them in washing machine).
Though with use we have noticed it indeed keeps you a tad cooler than other scarves; but this summer any scarf in Europe (or anywhere for that matter) would have been a terrible idea. It is a nice autumn scarf too; however, in winter it is a different experience! Eri keeps you warm and you do not even have the uncomfortable itch caused by wool.