This semi-custom cover is specifically designed to fit a Modified Tri Hull with an outboard engine which is from 14'5" to 15'4" with a beam of 72". It features Gore® Tenara® threaded seams and a 5-year warranty.This cover is gray (GY) and constructed using Taylor Made's Hot Shot brand fabric. Taylor offers four kinds of fabric in their semi-custom covers:Poly Cotton fabric is a 10 oz. 60/40 poly/cotton blend that has great breathability. It is good for water-, mildew- and UV-resistance. It has good strength, but isn't advised for hot or humid climates.Hot Shot fabric is a 6 oz. acrylic-coated polyester with good breathability. It has great strength and water- and mildew-resistance. It has very good UV-resistance and is recommended for hot or humid climates.Ultima fabric is a 6 oz. urethane-coated polyester with good breathability. It has great water-, mildew- and UV-resistance. It has great strength and is recommended for hot or humid climates.Boat Guard fabric is a 3.2 oz. pigment-coated polyester with good breathability. It has very good water-, mildew- and UV-resistance. It has very good strength and would function well in hot or humid climates.Taylor boat covers come in three levels of customization: Universal, Semi-Custom and Custom. The semi-custom covers are designed for trailering over 30 different hull shapes, from paddle boats to competition ski boats. There are many differences between each variety of cover in regards to what dimensions or accessories they will accommodate. Universally, though, they feature sewn in tie-down loops, a double-folded hem with an integrated shock-cord and 4-ply seams. These boat covers feature Gore® Tenara® thread in their seams which will not stain, mold, mildew or discolor -- it will outlast the material it is sewn into. Please note that these covers generally aren't made to fit aftermarket swim platforms. Also, please note that this cover comes with a motor hood.For more descriptions of common boat types, see the GoBoating website here.Taylor offers a fit guide for their own products that is linked here.