New 2026 Jayco Seismic 399 Toy Hauler Fifth Wheel

NEW 2026 Jayco Seismic 399 Toy Hauler

Turn every destination into an event with the New 2026 Jayco Seismic 399, a luxury toy hauler engineered for high-energy adventures, extended stays, and unforgettable nights at camp. From the massive garage party deck to the upscale residential interior, this Seismic is built for those who want to bring the thrill with them—and relax in style once they arrive.

The 13' 6" garage is more than just storage for your toys—it’s a true multi-purpose space. It features a queen bed with convertible sofas, an overhead garage loft with storage, and a side man door for easy access. When the toys are unloaded, drop the rear ramp party deck and transform the garage into the ultimate outdoor hangout with fresh air, views, and room to entertain.

Inside, dual opposing slides create a wide-open living space designed for comfort and connection. Stretch out on the L-shaped tri-fold sofa, enjoy meals at the dinette, and keep everything stocked with a large refrigerator and pantry. The 4K Smart LED HDTV anchors the living area, making movie nights, game days, and downtime just as enjoyable as the ride to camp.

Up front, the private master suite offers a peaceful escape after a full day outdoors. The 60" x 80" queen bed sits in a slide-out for added floor space, while a full walk-in closet, dresser, and washer/dryer prep make longer trips easy. The dual-entry bathroom is spacious and residential, featuring a walk-in shower, vanity, toilet, and overhead storage for daily essentials.

Built for serious travel, the Seismic 399 rides on 102" wide-body structural steel I-beam construction and includes Jayco’s Climate Shield zero-degree tested weather protection, allowing you to camp comfortably year-round. The fully enclosed and heated underbelly, 35,000 BTU furnace, PEX plumbing, and durable construction ensure confidence wherever the road leads.

Key Highlights

• Rear ramp door with party deck

• 13' 6" garage with queen bed, convertible sofas, and overhead loft

• L-shaped tri-fold sofa and spacious main living area

• 4K Smart LED HDTV

• Front private bedroom with queen bed slide-out

• Walk-in shower with dual-entry bath access

• Full walk-in closet with washer/dryer prep

• Three-season garage wall and doors

• 30-gallon fuel station with timer

Why Buy from Campers Inn RV
Campers Inn RV is America’s Trusted Resource for RVers. With decades of experience, transparent pricing, and a nationwide service network, we’re committed to supporting your RV lifestyle long after the sale. Our knowledgeable team helps you find the right RV for your adventures, backed by reliable service and customer-first care every mile of the journey.

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