Technology:Megatherm:- Super Lightweight Filling Made Of Microsccopic Polyester Fibers With Exceptional Thermal Efficiency Creating An Insloation Camera Effect Similar To The Effect Of Down Due Ti Its Hollow Structure Traps Air Particles. Wash-Resistant And Hypoallergenic, This Filler Also Is Very Comnfortable Thanks To Its High Flexibility And Fast Drying.Nycire:- Ultra-lightweight nylon fabric specially developed to contain a down filling due to its inner coating, which provides certain repellency to rain that favors the sliding of water drops preventing its absorption , weight gain and humidity of the clothes Comfortable and soft, it is suitable for everyday use and to layering system.Alutherm:- Fabric developed in base of heating refelexion technology, providing temperature control thanks to the inner aluminium layer which reflect and keepsthe body heating highly breathable to keep the body dry and comfortable. Compare prices from: Joluvi in Men's Clothing