... Weather takes a heavy toll on a boat. ... Paint will also “craze” - develop small cracks - that make the surface look dull. ... Wood can absorb water in areas where the finish is worn. ... If this happens in the winter, the water will freeze and split the wood or fiberglass. ... An important feature of high quality boat covers is the ability to “breathe”. ... This leads to all kinds of moisture related problems such as mold and mildew. ... Cotton is made waterproof by using a very tight weave. ... When dry, the material shrinks and opens the pores to allow trapped moisture to escape. ... Extending the cover down to the waterline is better for securing it because wind can’t get under the fabric and pull the cover loose. ... These frames (and usually the covers) can be custom built for each boat. ... Make sure you purchase a system that’s easy to install and remove. ... Boat covers, especially custom built units, cost a lot of money. ... Ordering custom covers in the offseason will usually get you a good discount. ... Boat covers help to protect against damage from snow, rain, wind, and sun ...