Although the British flag underwent a number of changes in the 17th century, the St. George's Cross continued as the official national flag. For seagoing ships, however, the official banner was the Union flag (better known as the Union Jack, and as the King's Colors), which combined England St. George's Cross with Scotland's St. Andrew's Cross (a white saltire on blue). In 1707, the Union flag became Britain's national land flag. 100% Nylon for long-lasting outdoor use.