So you have to cover them for 'ultimate longevity'. Right... ;)
Q. How do I take care of my target?
A. All Morrell targets are designed with your shooting comfort and enjoyment in mind, which means we design them to withstand the elements of weather (so you can leave them outside). On our bag targets, as long as you keep a good cover on them, they should maintain excellent performance. On our broadhead targets, little extra care is required. For ultimate longevity, keep both broadhead and bag targets covered when not in use, in order to shield them from the sun and rain.