Definitions for "Thinsulate"
Microfibers trap dead air to keep feet warn while absorbing water to maintain warmth in damp conditions.
a low loft polyester fibre insulation that provides warmth without puffiness or extra weight. Waterproof: describes fabric that cannot be permeated with water. What makes waterproofness relative is that some fabrics and finishes are more waterproof than others, and may be waterproof for some uses but not others. Usually refers to an item that has taped sealed seams in addition to waterproof coating.
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.