I'm hoping to do some sea kayaking while in Scotland. I do need gloves or mittens for chilly weather and midges. I've got some fleece mittens I like: 3.35 ounces. The ends pop off so I can use my fingers. (I've got chilly fingers so I prefer mittens.) If the weather is warm and the midges want to lick through the Smidge to eat my hands, the fleece mittens will be too warm.
So I whipped up some waterproof ripstop nylon (it was on hand) mitten covers that go all the way past my elbows. This way I can wear the fleece mittens underneath while paddling.
I'll seam seal them, (this part I didn't think through in advance. I guess welding or glue is actually the better way to make them) . They should be okay-- even if they leak a bit while paddling. Pre-sealant they weigh, 1.8 ounces. I'll probably smear the palms with a little Goop or sealant for better grip.
They weren't hard to make, the fit is definitely oversized. I basically followed the design on
http://www.trek-lite.com/index.php?threads/myog-shell-mittens.3779/ but made them 26" over all length. At the top end I ran some 1/8" shock cord around and stitched a seam. The three part design I worked from seems to work really well with the thumb, which is the only critical part.
I have a sewing machine, but I think they could be easily glued along the edges then turned inside out.