Product Patent: AGS™Pro Pressure Relief System: As the core component of the AGS rebound pressure relief system, it generates rebound force through the elasticity produced by each step during walking to support the load, providing users with an unprecedented pressure-free experience. Product Features: - Central Extra Strong Rebound Device: The AGS™Pro pressure relief system uses stainless steel springs as the rebound core. When the user walks, the high-speed rebound force of the shoulder strap causes the weight to rebound upwards, reducing the perceived pressure by 30%. - EVA Back Support System: Made from ultra-lightweight and high-tensile EVA material, the comfortable shoulder pads are designed with grooves and newly added mesh for enhanced breathability. The waterproof and wear-resistant back pad provides excellent cushioning to relieve the pressure on the body, while maintaining a straight spine and reducing health risks caused by poor posture. Product Features: - A total of 8 compartments