Choose from black, green, orange or white. These are our best sandbags and are very heavy duty (4 oz/yard, heavier than many tarps). Depending on use, they can last for up to four or even five years. Their heavy construction resists rips, punctures, abrasion, and they come very close to being waterproof. They're manufactured domestically, and come with hemmed openings, folded double-stitched bottoms, and tie cords.
We've only carried them for the past 3 years, and so we can't yet swear to their lasting 4 years. Sustained exposure to UV & IR, abrasion, rough treatment & other factors may affect how long they'll actually last. But we've had several of them laying around outdoors for several years now, exposed year-round to sustained high-desert sunlight, high UV, freezing, and we'll occasionally abuse them by kicking them & throwing them around. They tend to fade slightly, get softer & more pliant, but so far we've seen no signs of degradation. We're impressed. We think you will be, too.