Russian Ad Watch: Bouncing Boobs Sell Helmets.

(via)
OK, not Russian, Ukrainian. GoFree is a chain of sporting goods stores. The model's name is Olga. Her breasts appear to be unenhanced. Ukrainian readers: please translate the copy? Thank you ahead of time. Previous products sold with Bouncing Boobs: Nissan's front independent suspension • earbud headphones.
update: see comments for translation.