HART Rubber Floating Swim Fins Size 7-9The HART Full Length Rubber Fins Size 7 9 are designed to enhance your swimming experience, whether you're training or enjoying leisure time in the water. These slightly heavier fins help to increase foot flexibility and build leg strength, making them an excellent choice for both fitness enthusiasts and casual swimmers. The toe and heel areas are soft and comfortable, ensuring a snug fit, while heel reinforcement adds durability for long term use.