Silkworms-Am I gonna need a heat pack.?

[SkittlesK]

Hey guys,
I'm buying from coastal silkworms and was wondering if I need a heat pack.?

The lowest temp falls to 39 degrees during the night.
Highs in the 50's during the day.

I don't think I'll need a heat pack.
Should I buy one just in case.?

Does it really matter if I get a heat pack in this case or will the heat pack kill the silkworms.?

Thanks.

 

[Sue E.]

Have them held at the post office for you if they are shipping them. Thats what I do and they always arrive alive. I think silkworms need a temp 70 or above, not 100% positive.

 

[SkittlesK]

Thanks.
The website doesn't say but I've read it's either 50 degrees or 40 degrees when shipping silkworms.