Yellow Density (High Performance) - Widely used for team rider’s shortboards, ‘Yellow’ will produce what might be considered the lightest urethane foam surfboard on the planet. The popularity of this foam continues to grow even though the life of the finished surfboard may be short.
Green Density(Standard) - This is the Median Density foam when all customers average out all blanks made by Arctic Foam for density choice. The ‘all time’ favorite foam for shortboards. High paddling buoyancy and lively surfing response on a wave make this foam the choice of hard core to recreational surfers.
Blue Density (Classic) - is considered excellent for compression strength. There are cutting edge manufacturers who make most of their shortboards from Green Foam and their team rider boards from Yellow Foam. By comparison, more conservative manufacturers feel that dent free longboards should be made from Blue Foam. It is also true that these heavier foams require less glass and thus a saving is made.
Purple Foam(Retro - Nose Rider) - The original 1960’s Malibu (longboard) foam. This foam as a blank used to be glassed with two layers of ten ounce on the deck and one layer of ten on the bottom. For weight and strength.
Silver Foam (Tow - Kite) - Just as you would imagine it to be. Silver has to compete with wood so it is very tough.