When comfort is a must, this Mirage 1mm Neoprene/Lycra Mens Zip-Up Watersports Black Jacket is brilliant. It has a neoprene core for warmth with Lycra side panels and arms, making movement and flexibility a breeze. This neoprene/Lycra zip-up top is light enough to be taken with you anywhere that the water spray and wind might make things a bit chilly or damp. Perfect for keeping you dry and warm when you are boating or fishing or kayaking.