I
am a larper......feel free the heckle
I've made several cloaks and robes both for myself and by way of trade-goods in a wide range of fabrics, ranging from cotton to light woollen to blanket to
teflon coated poly-wool and they are all quite useful garments (even if I do look like a LotR reject
)
LarpStore are one of the expensive suppliers, I could probably make something like any of the garments shown for much less
If you're interested PM me
If you're planning on doing your own my advice is
Shop around for fabric and make it as full as you can afford, narrow cloaks are a waste of time and money
Don't make it much longer then your knees, mid calf is really the maximum. Any longer and it becomes a trip hazard and you won't miss the extra length when you're sat down
Fastenings are important, minimum is one at the neck and one at belt hight (the last one could just be a belt or sommat)
Look into rain proofing
Lastly, who cares what you look like, question is are you warm and comfy ?