- the black strip is used to tie the rope to the edge of the pool. The float uses the elasticity and strength of the bungee cord to wrap around. 2. Designed for professional swimming training or just general practice. 3. The swim leash is designed to never slip when swimming, training or playing sports and to maintain safety and comfort 4.Elastic cord maintains power tension during standing training Produktbeschreibung 1 The black bands used for the rope on the banks of the pool. The float uses the elasticity and resistance of the bungee cord to exercise. 2) Suitable for professional swimming training or just general practice. 3, the swim line is designed so that swimming, training or sports are in place and maintain safety and comfort 4. elastic line maintains tension during standing workouts 5. it allows you, in small pools or in confined spaces in place, to go swimming. 6) This is an adjustable nylon strap around the waist and the other end of the stretch leash is attached to a