The insert The plastic is rotationally molded in a durable, maintenance-free and UV-resistant polyethylene plastic. The plastic is virtually indestructible and has an estimated lifespan of more than 40 years. The plastic can withstand heat up to 130 degrees and down to -50 degrees. It is environmentally friendly and fully recyclable. The insert is available in beautiful dark gray with stone effect, the stone effect makes dirt and sea water less visible in the hot tub. The lid The lid is shaped, with a core of heavy insulation to keep the heat in the water even during the cold winters. The lid is reinforced and covered in fine gray vinyl. The lid is foldable in the middle which makes the lid smooth and easy to lift off. The lid has four straps with associated brackets and locks, the locks have a two-digit code lock. The lock and brackets are mounted with the supplied screws. High-performance marine aluminum stove Slim, self-designed internal stove that provides more space than traditional internal stoves. The stove has a high heating efficiency. Slim stove cover that provides maximum space in your bath. The cover allows you to sit next to the stove without burning yourself while bathing. Made of stainless steel and not wood as traditional covers are, wood easily collects dirt and bacteria that you do not want to keep in your bath. The stainless steel cover is easy to clean. Structure Polyetheplast The plastic is not self-supporting, it needs a support for the floor and seating area. Build your own support using our drawings and assembly videos or buy an insulation package (you do not need to build any support with the insulation package, it gets the support it needs then) Then place the bath on a flat and stable surface that can withstand the weight of the water and the bathers. The insulation It is important to have good insulation to be able to keep a low operating cost, we offer Sweden's best insulation package for our baths. 85mm thick in the walls and made of EPS 100. Easily assembled like a big puzzle.