Features: Made of high quality neoprene material, wear-resistant and breathable, long lasting durability. Total 42/63 pouches for adjustable weight loading, convenient to load sand or steel plate(not include). Thicken and widen shoulder straps with comfortable pad to absorb shock and reduce discomfort. Strong adhesive fastener tape for adjust tightness freely, stay fastened and do not slip when use. Smooth front zipper for easy to put on and take out, easy to put in steel plates with anti-drop pockets. Reinforced stitching workmanship keeps a long service life, solid and durable in use. Great accessory for physical fitness, weight loss, weight training and muscle building.