DURABLE MATERIAL: KLOLKUTTA pull buoy is made of high-density 5 layers EVA foams, which provides flotation and low water absorption. Lightweight, soft and comfortable for swimming training. SWIMMING TRAINING AID: Calls for focus on the hips to build core muscles, which can increase core strength for body. IMPROVE STROKE TECHNIQUE: Buoy helps to generate symmetry in body movement, which provides the foot buoyancy without kicking and it will improve overall swim strokes. APPLICATION - Great training aid for swimmers of all levels , place between the legs, perfect training device to develop upper body and arms. Great Christmas and birthday gift idea. WARM TIPS: This pull buoy can not to be used as a life-saving flotation device. Adult supervision is required when this product is being used. Foam Pull Buoy /b br KLOLKUTTA Leg pull buoy immobilizes legs and provides lift to build upper body strength and increase focus on proper hip rotation. EVA foam provides durability and prevents skin irritation. br br Function /b br Promotes an elevated body position br Improves streamline br Increases upper body strength and tempo br Suitable for Swimmer Adult Youth for Leg Float Upper Body Strength and Aquatic Water Exercise br br Specification: /b br Material: EVA foam br Color: Blue + White br Size: 24(L)x15cm(W) br br