YOKU is a modular sauna designed by Marco Williams Fagioli (Zup design). The name YOKU comes from a branch of Japanese natural medicine based on the beneficial effects of contact with plants and the forest atmosphere. The outstanding feature of YOKU is its natural and organic aesthetic. The heater is built into the lower bench so it does not detract from the minimalist design. The version on display is a YOKU D (430 x 300 cm) built in heat-treated solid wood and fitted with a large glass panel in 8 mm toughened glass and a double wooden door.