The Citroen Cactus M concept was revealed overnight, ahead of its public debut at the Frankfurt motor show next week.

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The Cactus M is based on the C4 Cactus, which will be arriving in Australian showrooms in early next year. Riding on the same 2.6m wheelbase as the production C4 Cactus, the Cactus M concept has a body that measures 4.16 metres long, 1.73m wide and 1.48m tall.

Aimed at the surfing set, and inspired by the rugged and basic Mehari, the Cactus M features an interior that can be hosed out easily and which drains via outlets integrated into the foot wells. The seats are reportedly designed to resemble wetsuits and are upholstered in waterproof neoprene.

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There are hooks and latches on the top of the windscreen and rear pillar that allow users to store wakeboards and windsurfing boards, as well as the two surfboards specially designed for the Cactus M.

For rain protection the concept car includes an inflatable top, which can also be unfurled into a tent that covers the length of the cabin and beyond the folded down tailgate. For those planning an overnight stay, the Cactus M's seats can be rearranged to become sleeping quarters.

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The concept car's two elongated front doors are made from lightweight plastic and are coated in the same thermoplastic polyurethane that's used on the C4 Cactus' signature airbumps. Passengers sitting in the rear seats enter the car by climbing over the rear flank with the aid of the built-in side steps.

Under the bonnet there's an 81kW 1.2-litre turbocharged PureTech petrol engine coupled to a six-speed automatic transmission. There's no mention of all-wheel drive; instead, Citroen has chosen to emphasise the car's Grip Control system that's said to provide improved traction.

The Cactus M rides on 19-inch wheels that are shod with the same Tall&Narrow tyres as the Peugeot Fractal concept. These tyres are said to feature a narrow tread pattern and have been designed to minimise aerodynamic noise.