AGS: Two Core Functions to Alleviate Shoulder Fatigue 🩸 Restoring Blood Circulation: The repetitive rebound mechanism creates dynamic decompression intervals, preventing the compression of muscles and blood vessels to maintain optimal blood flow. 🦴 Reducing Intervertebral Disc Pressure: Through periodic decompression, it allows the intervertebral discs to expand, continuously pumping in hydration and essential nutrients to maintain structural integrity. Four Core Benefits ⏱️ Delaying Fatigue: Facilitates the efficient removal of metabolic waste, thereby sustaining muscle strength. ⚡ Mitigating Soreness: Prevents the accumulation of metabolites, extending comfortable load-bearing time by 50%. 🛡️ Preventing Chronic Strain: Preserves muscular and spinal strength, enhancing the body's resilience against impact forces. 🏃♂️ Conserving Energy: Minimizes muscular compensation, significantly reducing overall energy expenditure. 🔬 Scientifically proven to reduce pressure by 30%. Specification PRODUCT FEATURE: AGS PRO+ BACKPACK - AGS PRO+ - A revolutionary technology consisted of a stainless steel rebound core behind a backpack that absorbs downward impact and creates upward rebound force. Protecting your muscle and spine. It is also an interchangeable spring suspension system that lets users swap springs according to their load, ensuring optimal support and comfort. - 4-8kg spring equipped by default – EVA Back Padding – Storage pockets on both sides – Adjustable chest strap – Versatile and practical compartments – Equipped with a 4-8kg spring by default PRODUCT COMPARTMENTS: – Top Zipper Pocket x1 – Main Extra-Large Zipper Pocket x1 (Interior Compartments:17.5-inch laptop compartment x1、8.3-inch tablet or notebook compartment x1) – Front Zipper Pocket x1 – Water Bottle Slots x2 SIZE:30W x 56H x 18D cm WEIGHT:1.07kg VOLUME:30L