Iso paddles are strapless paddles designed to isolate specific muscle groups, develop proper hand position and heighten stroke awareness. Iso paddles are uniquely designed to create an imbalance in the catch phase of a stroke, which forces swimmers to apply more pressure on either side of the paddle in order to maintain a proper stroke. The variance encourages swimmers to pay increased attention to hand position in the water, keeping it level and consistent throughout the catch and pull of each stroke. Can be worn two different ways to isolate both the outside and inside muscle groups. Intended for use on drills and stroke-specific training. Paddle provides instant feedback and will fall off if the swimmer does not maintain proper technique. Increases the 'feel for the water' and allows swimmers to make adjustments to improve stroke technique. Using the edge on the outside (grey on left, yellow on right) allows swimmers to isolate and engage the triceps and trapezius muscles. Using the edge on the inside (yellow on left, grey on right) allows swimmers to isolate and engage the pectoral, bicep and deltoid muscles.