(Correction: 17!) I just finished making this pair of US Size 9 ultralight camp shoes for my Dusky track walk which I start on Monday. They are made from 3.6oz/yd2 Dyneema fabric. Together with a pair of down socks from https://goosefeetgear.com/products/down-socks/ (approx 50 grams per pair), I should have nice dry, warm feet at the end of what is usually a fairly wet slog each day. I will post the pattern and instructions when I get back (promise). I made these in a hurry . I could have trimmed a couple more grams off the back pieces which i simply sewed inside. I will see how much the next pair weighs. My guess is 16- 17 grams.
Update: The uppers (Dyneema) held up well to 10 days in Fiordland (Dusky Track) but the inners (blue foam) became compressed. I have replaced them (now I am home) with Urethane inners at a cost of 10 grams each. However, they were comfortable camp shoes which protected my feet when I went outside, and also kept my socks dry – so they admirably served their purpose, moreso than anything I have bought or used before. They also allowed my feet to breathe at the end of the day unlike others I have tried. I recommend you make a pair. I will post the instructions soon – once I have caught up on my other chores – such as a report on my trip! See: http://www.theultralighthiker.com/from-dawn-to-dusky/ & ff.
PS:When I cut the unnecessary pieces of Dyneema away, the shoes weighed 17 grams! As you can see the shoe on its owned weighed 12 grams! I am trying two different inners: the Ascent urethane (27 grams) and the Redbacks (30 grams) total. Weights as shown on the scales: