The plain weave
The plain weave is the simplest of weaves. It's just a straightforward over-under weave forming squares.
Because the fuzziness of the cashmere fibre fills the space within the empty square between the threads, the tactile feeling of softness is enhanced.
A loose, light weave makes for a very flexible scarf that can be easily styled in different ways.
A closer-woven scarf would be suitable to be worn secured against your skin (soft!), such as when you're out and about in winter wear.
The Herringbone Weave
This weave is a classic - and classy - 'V' shaped weave. This weave sacrifices some softness for tightness. Not that you will notice, because the row of V shapes gives it a silky smooth tactile sensation. It's also a very flexible weave, and easy to style.
The Diamond Weave
The diamond weave is a visually interesting weave for its subtle cascade of interlocking diamond pattern.
This weave has a more or less similar effect on softness as the herringbone. However, the tactile perception is not as silky, because the diamond pattern is an equally lateral-vertical 'grain'. The symmetry makes it a sturdier weave, so it is perfect for an everyday sort of scarf.