FAQs on material thickness for boat covers, jet ski covers, motorcycle covers, ATV covers, and golf cart covers.

What determines the thickness of a cover?

“Denier” is the term used to describe the thickness of a material. The thicker the cover material, the higher the denier.

Are thicker covers better?

Thicker covers are better for outside storage. They’ll stand up better under the wear and tear of rain, snow, sun, and the elements. For inside storage in protected areas, thinner storage covers work just fine.

What is the recommended denier for indoor and outdoor storage covers?

For outdoor storage covers, a thickness of 300-600 denier is generally sufficient. For indoor storage covers, a thickness of 150-300 denier provides adequate protection.

What about breathability?

The thicker a storage cover is, the more difficult it is for air to flow through the cover. Without adequate venting, a thick storage cover will trap condensation inside the cover, possibly resulting in moisture damage. Most manufacturers include a venting system to make a thick cover breathable. The vent allows air and moisture to escape from underneath the cover while preventing moisture from entering.

How much does a quality storage cover cost?

The higher the denier, the more you should expect to pay. If your motorcycle or boat is in a fairly protected area, you may be able to get away with a thinner, lower cost cover. If you store your motorcycle or boat outdoors, invest in a thick, high quality storage cover with vents. It will cost you a little more up front, but the quality of protection will save you money in the long run.