Thank you for viewing! This is a new-concept training device, the "Water Bag," which utilizes the movement of water to efficiently train your core. It's recommended for those who want to easily achieve本格的なボディメイク (authentic body shaping) and muscle building at home. 【Main Features】 • Core Stimulation with Irregular Load As the water inside the bag moves, the center of gravity changes, providing an "unstable load" to the entire body, unlike fixed weights like dumbbells. By trying to maintain balance, it powerfully supports the deep muscles (core). • Weight Adjustment Up to 35kg You can adjust the weight to your liking simply by adjusting the water volume. With water level indicator lines, training is possible with optimal loads for everyone, from beginners to serious athletes, regardless of gender. • Space-Saving and Convenient Storage When not in use, you can drain the water and air and fold it compactly. It doesn't take up space and is easy to carry. • Durable PVC Material Durable polyvinyl chloride is used for the exterior. With sturdy handles, it supports various exercises, such as lifting and swinging. 【Product Specifications】 • Brand: Gorbobo • Size: Approximately 75cm long × 23cm diameter • Maximum Weight: Approximately 35kg (when full) • Material: PVC 【Set Contents】 • Water Bag Body • Dedicated Foot Pump • Japanese Instruction Manual ※ The water in the product image is a coloring example. Coloring agents are not included. 【Product Condition】 Brand New