Thinsulate

3M's 35 percent polyester/65 percent olefin insulation spun into a low-loft construction. Thinsulate is an efficient insulator in comparison to its thinness. Most often used in outerwear, footwear, and gloves because of its lack of bulk.
Found on http://www.encyclo.co.uk/local/21117

Thinsulate

A fabric created with a mixture of Polyethylene terephthalate and polypropylene that can retain heat using dense fibres, and resist water whilst remaining bulk free. Thinsulate fibers are 15 micrometres in diameter, thinner than standard polyester fibres.
Found on http://www.gooutdoors.co.uk/glossary
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