Ray Ban 'yarn ball' by Cutwater

Ray Ban 'yarn ball' by Cutwater
Ray Ban 'yarn ball' by Cutwater

The hills of San Francisco are once again the setting for a ball-themed ad, but this time two guys wearing Ray Ban glasses release a giant ball of yarn down the slopes.

The campaign, created by Cutwater, is supported by print work that includes the strapline: "It's all downhill from here."