Too warm for wool?

I eventually received my yarn from the US all the back to France. I could benefit from sales at Web's. Well, it's still the most expensive sweater I will knit so far, but this time I really wanted to have the exact matching yarn for my Serpentine. I may well start my project only in a couple of month (and do another one) as it's getting towards summer. I am participating to another french KAL "Lace & summer yarns".Maybe Sand Dollar with a Bamboo Yarn will do??