An adventure is an exciting or very unusual experience. participation in exciting undertakings or enterprises: the spirit of adventure. a bold, usually risky undertaking; hazardous action of uncertain outcome. Here at Marmalade Sunset Tees we offer a large variety of outdoor adventure tees relating to beach, camping, hiking, skiing, and many more. Why not pick out that perfect tee for your collection. All of our tees are printed on everyone’s favorite tee, which features a crew neck, short sleeves, and superior combed and ring-spun cotton.