It depends on the intended use. For longer term applications (over 9 months) corrugated signs will give you more longevity. But you don’t need to worry, all inks used at SignRocket are UV and designed to handle the elements. SignRocket recommends corrugated for applications over 9 months, but when you’re needing shorter term signage (< 9 months) or on a budget, Poly Sleeve signs are a popular option.