A great supplement to Call The Suit. Flippers (freestyle) features an above water view and below water view of the freestyle stroke, simultaneously. It fits in your pocket. An amazing tool for coaches to show swimmers the visual they are communicating ~ and the only tool on the market that shows the rhythm of the freestyle stroke while allowing the user to pause and study one specific phase of the stroke cycle.
The Flippers book is the perfect tool to fill the void between reading/talking about technique and actually seeing it.