The question is, why does the tarp need to be that big? I can understand it in some hammock situations, tho as others have said in substantial rain even the 3x3 isn't big enough. If I'm not in a hammock, why do I need a tarp that is 3m x 3m? The Alpkit Rig 3.5 is 1/3rd the weight of the dd 3x3.
Julia
Tarp size
Myself I don’t like diamond tarps.. ok in the summer but in the winter give very little protection to things on the ground, they cannot be lowered to the ground to stop the airflow under them, if the rain is falling at an angle /getting blown, then anything on the ground will get wet...this leads me to say square or rectangle,
Size wise I have 3x3, 4x4, 4.5 x 3, and 4ish x 2ish (poncho Tarp)..
The 3x3 in my opinion is short for hammocking in the winter/rain unless you use it as a diamond.. But for me the reasons above count it out,
I find the 4.5 x 3 a bit too long you have to pick your trees well.. also if you take the tarp to ground the 3 meter lives you a low ridge, myself I find this a pain as I have to stoop under it...this I also find with the 3x3,
I have used the 4 x 4 quite a lot find it has plenty of room you can comfortably burrito the ends in to form doors and have loads of room, the ridge is also at a nice height for me and does not restrict movement under the Tarp.. the amount of room also give you loads of admin space it weather is a bit fowl, that also means that of your 6" and have a 50" chest you got comfort as well, and your not scrambling round in something thats too low...if you have not got a communal shelter....The only thing I would say is the 4x4 can be a bit of a sail in V high winds... and can billow in.. I have not found this yet, but some have.
The smaller poncho type for me is just for warm sunny times...oh and of course Boonie weekends..lol
I like the DD's, and have had no problems with them..they have external ridge line loops..and the tarp hangs under them, with a ridge line that runs under the tarp, but that could lead to rain running down the ridge line, under the tarp and dripping inside the tarp on to whatever’s under it... if your hammocking , in to your sleeping kit...., yes you have hanging possibility’s of things , but just add an extra internal ridge line,
So to me the 4 x4 is the best size for my needs...hope my thoughts help