Primaloft Sport 40g/m2 Insulated Parts: Covered with a lightweight nylon woven fabric. Formotion: Ultimate performance and comfort while in motion. Body Mapped Hybrid Construction: Combining the advantages of different performance-fabrics for key sweat and heat areas of the body. 4-way Stretch Soft Shell: For enhanced freedom of movement. Weight: 13 oz / 360 gram. Athletic fit. 100% Polyester, 91% nylon/9% Elasthane.