RooftopTentCompare

Naturnest Sirius 1 Plus vs Overland Vehicle Systems LD TMON

The Naturnest Sirius 1 Plus and the Overland Vehicle Systems LD TMON are both hardshell tents in the same part of the market, which makes them a genuine head-to-head rather than a comparison across categories. Naturnest and Overland Vehicle Systems take noticeably different approaches to the same problem.

By the numbers, the Naturnest Sirius 1 Plus brings 75 kg, 3.36 m² of floor, 120 cm of headroom and sleeps 3. The Overland Vehicle Systems LD TMON counters with 68 kg, 2.67 m² of floor, 165.1 cm of headroom and sleeps 2.

The LD TMON is 7 kg lighter at 68 kg against 75 kg, which on a factory roof rated for 68 to 75 kg is often the difference between a legal fit and a rack upgrade. Inside, the Sirius 1 Plus gives 3.36 m² of sleeping floor against 2.67 m², about 26 percent more, and it sleeps 3 to the LD TMON's 2. Headroom separates them further: 165.1 cm in the LD TMON against 120 cm, which is the difference between sitting up to dress and doing it lying down. The Sirius 1 Plus lists about 11% lower than the LD TMON. Overland Vehicle Systems also backs the LD TMON for 2 years against 1.

They open differently: the Sirius 1 Plus is a fold-out and the LD TMON a clamshell. That is not cosmetic — it decides whether headroom is even across the tent or tapers towards one end, and how much of the roof the tent occupies when closed. The Sirius 1 Plus uses ABS hard shell with aluminium honeycomb base panel; the LD TMON uses honeycomb aluminum. Canvas differs too: 420D waterproof Oxford outer; mildew-proof plaid Oxford inner against 600D rip stop poly cotton Oxford. The Sirius 1 Plus adds a roof skylight, the ability to carry cargo on the shell and a matching annex, which the LD TMON does not offer. Closed, the LD TMON sits 16.259999999999998 cm lower on the roof — 15.24 cm against 31.5 cm — which is drag you carry on every mile you are not camping.

Naturnest

Sirius 1 Plus

The Sirius 1 Plus is an ABS fold-out hard-shell tent that Naturnest rates for two adults plus a child. Its published open size is 210 x 160 x 120 cm, folding to 159 x 130 x 31.5 cm, with a weight of 75 kg (165 lbs). It includes a 4.5 cm double-layer mattress, interior and exterior LED strips, a USB/Anderson power interface and a roof-top luggage bar rated to 20 kg.

  • Roof-top luggage bar rated to 20 kg for solar panels or gear
  • Includes USB/Anderson power interface and dual LED strips
  • Compatible with an optional annex room
  • Manufacturer does not publish a numeric season rating

Overland Vehicle Systems

LD TMON

The LD TMON is an entry-tier aluminum clamshell hardshell for two, with a tall 65 in interior height and a fast roughly 1-minute setup. It has interior lighting and a flexipanel storage system but no skylight, annex or heater port, and uses a heavier 600D poly-cotton body. OVS lists a 2-year fabric and structural warranty and a 150 lb dry weight.

  • Fast ~1-minute setup
  • Tall 65 in interior height
  • Interior lighting included
  • Short 2-year warranty

Which one to pick

Take the Sirius 1 Plus if you need the sleeping room more than you need the lighter tent. Take the LD TMON if your roof load limit is the binding constraint. Beyond that the feature rows below — heater port, skylight, annex, cargo rails — are where the remaining difference lies.

Every specification, side by side

Side-by-side specifications for Naturnest Sirius 1 Plus, Overland Vehicle Systems LD TMON
Specification
Naturnest Sirius 1 Plus rooftop tent

Naturnest

Sirius 1 Plus
Hardshell
  • Cheapest
  • Most floor space
Check current price

Overland Vehicle Systems

LD TMON
Hardshell
  • Lightest
  • Most headroom
  • Longest warranty
Check current price
Overview
TypeHardshellHardshell
Opening styleFold-outClamshell
Sleeps3— best of the tents compared2— worst of the tents compared
Season rating
List price$1,549— best of the tents compared$1,749.99— worst of the tents compared
Weight and size
Weight165 lb— worst of the tents compared150 lb— best of the tents compared
Packed length5 ft 3 in— best of the tents compared6 ft 11 in— worst of the tents compared
Packed width4 ft 3 in— worst of the tents compared4 ft 2 in— best of the tents compared
Packed height12.4 in— worst of the tents compared6 in— best of the tents compared
Living space
Sleeping length6 ft 11 in— worst of the tents compared6 ft 11 in— best of the tents compared
Sleeping width5 ft 3 in— best of the tents compared4 ft 2 in— worst of the tents compared
Floor area36.2 sq ft— best of the tents compared28.7 sq ft— worst of the tents compared
Interior height3 ft 11 in— worst of the tents compared5 ft 5 in— best of the tents compared
Mattress thickness1.8 in— worst of the tents compared2.5 in— best of the tents compared
Setup and build
Setup timeManufacturer's claim where published; otherwise estimated from tent type. Expect longer in practice.~60 secest.60 sec
Shell materialABS hard shell with aluminium honeycomb base panelHoneycomb aluminum
Fabric420D waterproof Oxford outer; mildew-proof plaid Oxford inner600D rip stop poly cotton Oxford
Warranty1year— worst of the tents compared2years— best of the tents compared
Features
Integrated LED lightingYesYes
Heater / HVAC portNo
Roof skylightYesNo
Annex availableYesNo
Solar readyYes
Carries cargo on topYesNo
Sources
Last verifiedNaturnest product pageOverland Vehicle Systems product page

Related comparisons

Or read the full spec sheets for the Naturnest Sirius 1 Plus and the Overland Vehicle Systems LD TMON.