Are you a "do it yourself" type of individual looking for a way to save some money on a boat mattress or cushion replacement? You've come to the right place! Below, you will find instructions on how to measure and make the cuts necessary to fit nearly all of your seating and bedding applications, including marine foam cushions or a foam mattress replacement. We have the foam sheets in stock ready to go for your seat back or sofa foam replacement, along with Dacron fiber fill wrap to finish up your project.