Jet Ski Cover XXXL 136ft-145ft - Durable 420D Waterproof Black

In this review of the XXXL Jet Ski Cover for 136'-145' waverunners, the bottom line is clear: this cover is for owners of larger 2- or 3-seater personal watercraft who want heavy-duty, season-long protection without constant fiddling. The reviewer found the extra thick 420D material and nano triple coating gave noticeably better water beading and UV resistance than thinner covers, while the elastic hem and four windproof buckles kept the cover secure on windy days. Installation is straightforward and the included storage bag makes it easy to stow away when not in use.

Key Features

• Extra thick 420D material: The oxford fabric with a nano triple coating protects against rain and sunlight while the inner layer stays soft so it will not scratch seat surfaces.
• High waterproof rating: Double-needle seams with added waterproof strips resist heavy water pressure so the craft stays dry during prolonged exposure.
• All-round wind security: Four adjustable elastic buckles at front, back, left and right keep the cover tight on the hull even in stormy conditions.
• Ventilation system: Two air vents on both sides promote circulation to reduce frost buildup and help keep seats and cushions dry.
• Easy fit and orientation: A full elastic hem and a front sign make fitting faster and ensure the cover sits correctly on 2- and 3-seater models.
• Portable storage: The cover ships with a compact storage bag so it is simple to carry or store off-season.

Who It's For

This cover suits owners of larger PWC models - those with hull lengths in the 136'-145' range - who need a reliable, durable solution for outdoor storage year-round. It works well for Seadoo, Yamaha Waverunner, Kawasaki and similar 2- and 3-seater craft where UV protection and waterproofing are priorities.

It is less appropriate for owners of small personal watercraft under the stated size range or for those who prefer a custom-fit, model-specific cover with molded contours. Buyers should measure bow to stern before purchasing to ensure the XXXL size is correct.

Pros & Cons

Pros

• Thick 420D oxford fabric and nano coating provide strong UV and water resistance.
• Four windproof buckles and full elastic hem keep the cover secure in high winds.
• Side air vents help prevent condensation and frost on seats.
• Easy to install and includes a storage bag for portability.

Cons

• Universal fit means this XXXL cover may be less trim than a custom-molded option on some hull shapes.
• Sharp ornaments left installed on the craft can damage the inner layer, so care is required during use.

Specifications

Brand	GRABADO
Material	420D oxford fabric with nano triple coating
Size Range	XXXl: 136'-145'
Fit	Universal for most 2- and 3-seater jetskis
Wind Security	4 adjustable elastic buckles (front, back, left, right)
Ventilation	2 air vents on both sides
Service	60 days replacement and storage bag included

Our Verdict

For owners of larger 2- and 3-seater personal watercraft, this XXXL jet ski cover delivers heavy-duty weather protection with thoughtful details like vents, a front sign and reinforced seams. It is good value compared with thin covers and is especially recommended for outdoor storage where wind, rain and sun exposure are concerns.

Frequently Asked Questions

Will this cover fit my 3-seater waverunner?
Measure from bow to stern; the XXXL size covers 136'-145' and fits most 2- and 3-seater models from major manufacturers.

Does the cover protect against UV damage?
Yes, the thick 420D fabric with nano coating provides strong UV resistance and SPF protection noted in the product details.

Can it be left on in stormy weather?
Yes, the four adjustable windproof buckles and elastic hem are designed to keep the cover secure in windy and rainy conditions, though removing sharp items on the craft is advised to avoid damage.