From the email:
"curlBOX Natural will be a limited-edition box. You do not need to be a current subscriber and current subscribers will need to purchase curlBOX Natural separately from their monthly curlBOX.
curlBOX Natural will go on sale this Saturday, September 29th at 3:00pm at shop.curlbox.com.
curlBOX Natural will be $40.00 (one time charge - not a subscription)
curlBOX Natural will ship the week of October 22nd."
I think I might just buy this one. Although $40 is expensive, I've never bought a curlBOX before and would like to try it out, especially if it's natural. But for $40, I better get like 4 fullsized products.