Recent improvements to a type of material known as aerogel could lead to a new generation of highly insulating clothing, a major conference has heard.
Aerogels have been around for a long time, and have been described as "solid smoke" because they are so light.
But these traditional types - made from silica - are fragile and brittle.
By altering the composition and structure of these materials, scientists have now produced aerogels that are hundreds of times stronger.