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2026 Jayco Seismic 399

The 2026 Jayco Seismic Toy Hauler is built for adventure, offering rugged durability and high-end comfort for all-season camping. With Climate Shield zero-degree tested weather protection, a 35,000 BTU furnace, and double-layer fiberglass batt insulation, you’ll stay comfortable in any climate. The fully enclosed and heated underbelly ensures peace of mind even in freezing conditions. With a blend of durability, luxury, and cutting-edge technology, the 2026 Jayco Seismic Toy Hauler is ready for your next great adventure.

Features may include:

Exterior

• 102 in. wide-body structural steel I-beam construction

• Stronghold VBL aluminum-framed and vacuum-bond laminated gel-coated fiberglass exterior walls and slide room end walls

• Magnum Truss XL6 Roof System (strongest tested roof in the industry) with Alpha roof membrane system (limited lifetime warranty)

• Painted fiberglass front cap with clear coat and built-in specialty LED lighting

• Custom automotive-grade vinyl exterior graphics package

• Climate Shield zero-degree tested weather protection

• NPS – Powered by Yamaha 6,000-watt generator with built-in pure sine inverter (gas/C.A.R.B. certified)

• 6-point hydraulic auto-leveling system

• Battery disconnect switch

• Detachable shore power cord

• Dual 30 lb. propane bottles with auto regulator

• Water heater bypass

• LP quick-connect

• Exterior marine-grade speakers

• Digital TV antenna

• Folding roof ladder

• LED exterior lighting package

• JaySMART (Safety Markers And Reverse Travel) LED lighting (patented)

• HELIX Cooling System (industry exclusive)

• Pass-through storage with Slam-latch baggage doors

• Under-mounted spare tire

• Fully enclosed, LED-lighted universal docking center

Interior

• Olympic king bed (359 & 413)

• Residential quilted bedspread

• Gas-strutted under-bed storage

• Washer/dryer prep

• 12V charging station

• Bathroom skylight

• Central command center with built-in tank monitoring

• Custom interior design (Dune Gray)

• LED interior lighting throughout

• No in-floor heat registers throughout the coach

• Vinyl flooring in slideouts (no carpet)

• Residential vinyl flooring (made in the USA)

• Hardwood safety handrail on hallway steps

• Carbon monoxide and LP detector

• 5/8 in. tongue-and-groove joined plywood main floor decking and 3/8 in. tongue-and-groove plywood roof decking

• Handcrafted and glazed doors, drawers, and trim

• Solid hardwood cabinet doors

• Residential finished dovetail-jointed drawers throughout

• Heavy-duty, 75 lb., full-extension, steel ball-bearing drawer guides

• Stain-protected fabric on all furniture

• Residential “Do it all” sink with pull-out kitchen faucet, glass rinse, and vegetable rinse

• Porcelain foot-flush toilet

• Inverter pre-wire