Good morning, Barry;
Here in the United States, the writings of Ray Jardine are probably the most definitive on really light weight gear for hiking and camping. Some of it may not be truly "durable," but there are some who say that the race car engine philosophy is the best: Just enough to get you to the finish line first. If the engine blows 10 feet past the finish line, it has done its job. An example is his recommendation for shoes; he likes light weight hiking shoes or even sneakers, not hiking boots. There are others who ask if this is a reasonable risk to trade off the protection for your ankles and feet for the reduction in weight. Read what Ray has to say, and you decide.
Enjoy;
Ralph Javins
When they ask you how many megapixels are in your camera, just tell them; "I use activaterd silver-bromide crystals for my image storage medium."