HTS code 9902.12.45 covers "Backpacks with outer surface of 230 decitex fabric of nylon and with laminated polyester knitted backing inner surface; such backpacks each weighing 0.85 kg but not over 1 kg, measuring 0.018 m3 but not over 0.022 m3 in volume; valued $14 or more but not over $21 each; the foregoing each presented with a detachable front pouch having its own shoulder strap (provided for in subheading 4202.92.31)" under the US Harmonized Tariff Schedule. This is the official duty rate charged by US Customs when this product is imported into the United States, sourced directly from the U.S. International Trade Commission and refreshed daily.