Parka in a military specification polyester nylon Rep. The weft yarns are thinner in diameter than the warp yarns, enabling the fabric to be tightly woven in order to obtain a compact, wind-resistant surface. The garment has been padded with a PrimaLoft® layer, an exclusive blend of ultra-thin fibres providing exceptional insulating capacity. PrimaLoft® is developed to stay drier even in wet conditions. It delivers the highest warmth-to-weight ratio of all synthetic insulations. The fabric is sprayed with a special anti-drop agent.