playing tennis in cold weather.. This jacket is perfect for playing tennis in winter. It is both soft and warm for your warm-ups. The zip makes it easy to slip on and off. Warmth : Jacket designed in brushed knit for maximum warmth,Softness : Soft against the skin for extra comfort This jacket is perfect for playing tennis in winter. It is both soft and warm for your warm-ups. The zip makes it easy to slip on and off. playing tennis in cold weather.