GAASTRA Sweatshirts & Hoodies - Sporty layers for cool days at sea. Our GAASTRA sweatshirts and hoodies keep you warm, are comfortable to wear and have a distinct sailing look. Soft inner materials meet robust and durable outer layers – ideal for changeable weather at sea and on land. Whether worn as a mid-layer under our jackets or on their own, they are an indispensable part of modern sailing clothing.