2026 Jayco Seismic 399

Jayco Seismic toy hauler 399 highlights:

• Party Deck
• Queen Bed with Convertible Sofas
• Overhead Garage Loft with Storage
• Walk-in Shower
• 72" x 80" King Bed
• 4K Smart LED HDTV

Get ready for outdoor adventures in this spacious toy hauler. Your guests will have the 13' 6" garage with queen bed with convertible sofa and a loft for added sleeping space, plus there is overhead storage for your things and a side man door to come and go easily. The main living area includes dual opposing slides with an L-shaped tri-fold sofa along the roadside and your roll-top table and refrigerator plus pantry in the curbside slide. Head up the steps to your front private bedroom with the dual entry bath accessible from the hall and inside the master bedroom. Here you will all enjoy a walk-in shower, toilet, and vanity with a sink, plus overhead storage. The bedroom features a third slide out housing a king bed for added floor space, plus a full front walk-in closet, a dresser, and washer/dryer prep!

One look at the Seismic toy hauler fifth wheels by Jayco, and you'll never go back! Each model features a custom automotive-grade vinyl exterior graphics package, a painted fiberglass front cap with built-in LED lighting, and 102" wide-body structural steel I-beam construction. You'll find the pass-through storage with Slam-Latch baggage doors will make unpacking easier than ever, and the rear ramp door/patio with anti-slip, non-skid flooring will allow you to unload your toys with no trouble at all. These toy haulers feature a three-season garage wall/doors, a 30-gallon fuel tank with a timer, and exterior marine-grade speakers to keep the party going. The Climate Shield zero degree tested weather protection includes a 35,000 BTU furnace and a fully enclosed and heated underbelly for better protection against the elements. And we haven't even touched on the interior luxuries you'll find, like solid hardwood cabinet doors, residential vinyl flooring made in the USA, night roller shades, and more!

• Bath and a Half
• Front Bedroom
• Loft
• Two Entry/Exit Doors