It is a solid and very compact obstacle in the shape of sleeves, 60 cm in diameter, length from 3 to 6 meters and with a spacing between the tracks of 250 mm. The tunnels are made of very durable PVC weighing 620g/m2, which are resistant to UV radiation with resistance down to -20°C. Thanks to this, it is possible to use and store without problems up to these temperatures. The weight of one standard tunnel with a length of 3 m is 9.9 kg (1 m = 3.3 kg).
 
The tunnels are reinforced with spring steel wires, which are covered along their entire length so that there is no possibility of injury during training or handling. The tunnels have a smooth inner seam. Fixed tunnels can be used even in very bad weather.