Nike Men's Park20 Sideline Jacket Whether you're training or competing, the Nike Repel Park Jacket is built to keep you dry thanks to a water-resistant coating. Lightweight insulation and a longer length help keep you warm in cold conditions. Water-repellent finish helps keep you dry when it starts to rain. Synthetic fill provides lightweight warmth. Elongated, full-zip design covers you from the elements. 100% POLYESTER.