To clarify, I'd spend the extra bucks to buy their "Vertex" rain tarp.  This model comes with XL but, in my opinion, their largest option (designed for their Vertex model hammocks) is worth the extra $20. 

Case in point, right about this time last month I was trying to get changed during a snow squall which hit our camp on the Maligne River.  The extra few feet of coverage would have been appreciated right about then.  Snow & sleet on bare legs... brrrrrrr!

Jimbo   8-)