#TSHJAPAN Shop <--- Click to check TSH products ☆ This is a core weight training device that uses water. ☆ Available in four sizes: 5kg, 10kg, 20kg, and 30kg. 【5kg】Length: approx. 30cm, Diameter: approx. 15cm 【10kg】Length: approx. 61cm, Diameter: approx. 15cm 【20kg】Length: approx. 77cm, Diameter: approx. 18cm 【30kg】Length: approx. 81cm, Diameter: approx. 22cm ☆ Adjust the weight by filling with your desired amount of water according to the markings. Then, inflate with air using the dedicated pump and securely close the lid. ☆ You can train your core and build muscle using various training methods, such as utilizing the weight of the water or working against the flow of the water. ☆ Water coloring is not included. ☆ It's lightweight and compact when the water and air are removed, making it easy to carry anywhere. ☆ Made of PVC material, it is soft and flexible, but it hardens at low temperatures and may be damaged if excessive stress is applied. Please be careful when storing or using it below freezing temperatures.