What is the difference between sealed and shielded drag systems for longevity?

A sealed drag system keeps water, grit, and salt out by enclosing the critical components—this adds protection and usually means less maintenance and longer life, especially in harsh saltwater or surf conditions. A shielded drag system uses barriers like washers or covers to slow down contaminants, but isn't fully watertight; it offers some protection, but over time, moisture or grit can still work its way in, requiring more frequent cleaning and care. For longevity, sealed drags hold up better where corrosion and fine sand are concerns, while shielded drags work in less demanding environments but need more attention.