Fun in the sun. In the interests of boat safety this is clearly a reference to turning left rather than anything to do with any alleged traditional association between sailing and alcoholic refreshment!
Comfortable and easy to wear whether manning the oars, manning the barbeque or just messing about on the river.
High quality (200gsm) T shirts with a fun logo that will appeal to anyone with a love of boats whatever the shape or size (of boat that is!). Great gift idea.