Some of the diving socks are weighty, but you can get them in 2-3mm neoprene, anklet size, that are just a few ounces. They make great camp shoes, and if you must glue, then you can glue on whatever foam you want on the bottom. The Deep See ones I bought have a textured sole, keep my hiking socks dry in camp, and double as a foot warmer/protector when fording wide streams, and fold up small. One of the recent Outdoor Retailer articles suggests that they are finally catching on with trekkers.
Oh, and they are very inexpensive.