The Neos River Treker is a great solution ... durable, functional and not too burdensome from a weight standpoint. Weight on these has been averaging 3.3-3.7 lbs (actual weight, not shipping weight) on the 5 or 6 samples I have weighed. For sizing, as an example, I use a size XXL River Treker with my Kenetrek Mountain Extreme 400 & Hardscrabble Hikers in 13 Wide.
We offer them with free priority shipping in the US.
River Treker Overshoes Mike
High Mountain Outfitters
cs
High-Mountain-Outfitters.com
http://www.High-Mountain-Outfitters.com