Best Insulation

Polartec Classic is a family of synthetic fleece fabrics produced by Polartec, the company formerly known as Malden Mills. Made from polyester pile, the material is designed to provide lightweight insulation, breathability, and quick drying, and it is commonly used in jackets, pullovers, blankets, a...

Polartec Alpha is a synthetic active-insulation textile developed by Polartec in response to requirements from United States special operations forces. Unlike conventional insulation designed mainly to trap still air, its open and air-permeable construction allows heat and moisture to escape more re...

Climashield Apex is a synthetic insulation made from continuous filament polyester fibers and used in sleeping bags, quilts, jackets, and other cold weather equipment. Unlike loose staple insulation, its fibers form a resilient sheet that can often be installed with limited quilting, reducing potent...

PrimaLoft Black is a family of synthetic insulation products made for garments and other insulated equipment. Like other PrimaLoft materials, it uses fine synthetic fibers to trap air and reduce heat loss, while retaining useful insulating performance in damp conditions. It is used in products such...

Thinsulate is a family of synthetic insulation materials developed by 3M and introduced commercially in 1979. It uses fine fibers to trap insulating air while allowing products to remain relatively thin, and different versions are made for particular clothing and equipment applications. The material...

Entry-level PrimaLoft synthetic insulation providing good warmth and moisture resistance at a lower cost than the Gold or Black performance tiers.

Thermolite is a hollow-core polyester insulation fiber brand by Invista designed to trap air for warmth while remaining lightweight and quick-drying, used as a synthetic down alternative.