Yarn Substitution

Anyone familiar with the yarn used for this pattern (weight?) Kanebo Caprice. I’m not too good at substituting yarns. Any suggestions? http://knitty.com/ISSUEsummer06/PATTlicketysplit.html
Thanks in advance for any help.

I’d say it’s a fingering weight yarn which is the same as most sock yarns. Look at a wool blend.