Truck bed liners protect your pickup from the damage that any kind of hauling causes. One option for liners is the plastic drop in liner. Here's how plastic liners are better than other types and what you should look for in the best liner. Tougher No material can protect better than the thick plastic used for drop in liners. Almost indestructible, the plastic also absorbs shock better than most other liners. That's one reason it's superior at dent prevention. You know, preventing dents is almost more important than preventing scratches. That's because scratches are so much easier to repair than are dents. Easier To Move Cargo If you need to slide cargo to handle it, a plastic liner is the way to go. If you need non-skid surfaces, another type of liner may be better. On the other hand, it is easy to add a rubber mat or even a carpet mat to provide the non-skid feature over the plastic liner. That way you get the protection of the liner plus the added features of the mat. Custom Fit Plastic liners must be custom fit. That's why most popular newer trucks have several available options for plastic linings. Liner for older trucks may be less readily available. The custom fit makes for a really finished look to any pickup. Some truck owners would argue that the plastic custom liners look better than any other option. Not Permanent Spray on liners promote the permanent nature of spray liners as a real plus. But what if you change your mind and decide you want something else? Too bad if you have a spray on liner. It's there for good. On the other hand a plastic liner is easy to replace. Since they cost so little compared to some liners, it's an option to just pull out a damaged liner and slip in a replacement for a brand new look. Damage From The Liner For all the advantages of these liners, here are problems to watch for as you choose one. Look for a perfect fit. Poor fitting liners often move with the wind. That often produces annoying noise or even worse. A poor fitting liner may vibrate and wear away the paint underneath. That's a perfect place for the start of rust and corrosion. That potential for corrosion under the liner means you should also make sure the bed continues to drain properly. A liner that hides water collecting underneath may do more harm than good. Truck bed liners come in many designs. No liner protects better than the right plastic liner. Just make sure the model you choose fits properly and doesn't trap water underneath. One possible option is the DualLiner which comes in parts instead of being in one piece. Al Bullington writes about his pickup truck projects. Check out his new website about truck bed mats for your pickup truck. Bed mats protect more expensive liners for nearly nothing. See our article about the Protecta bed mat for tips to get the best bed mats for pickup protection.