weighted training shirt 3d model

Create a complete wearable weighted training shirt with integrated 3-layer construction. Layer 1: black polyester-spandex compression shirt, breathable, athletic fit, short sleeves, looks like a normal gym shirt. Layer 2: reinforced nylon internal structure permanently attached inside the shirt, with multiple weight compartments distributed across chest, abdomen, shoulders and back. High-strength stitching, ergonomic weight distribution, flexible and durable. Layer 3: removable metal weight modules inserted into internal pockets, secure fit, adjustable load up to 20kg total. Show complete assembled shirt, not exploded view, not floating parts. Visible cutaway section revealing all 3 layers. Realistic sports equipment, manufacturable product, professional industrial design, realistic materials, front view, back view, side view, high detail, clean topology, realistic proportions, premium fitness technology, functional engineering prototype.