high quality Our muscle trainers are a must-have for sports enthusiasts and are suitable for high-energy activities such as track and field, running, swimming, gymnastics, martial arts and outdoor activitiesMade of ultra-flexible pure silicone, the trainer provides comprehensive abdominal muscle training for a variety of users, and its compact and portable design ensures comfortable and convenient use.Allows you to customize training intensity based on your desired results. Features adjustable pressure levels; adjust the flow valve to find the perfect resistance for your training needs and get the best training results with personalized resistance adjustments.Our Muscle Trainer suitable for almost everyone without side effects. Easy to adjust, which can meet different needs and achieve better results.Continuous use of muscle trainers can improve your physical fitness, enhance abdominal muscle endurance, and allow you to experience professional muscle training.