Yes they are, however this does not mean they will last forever. Your product frame, net, safety padding or mat will deteriorate eventually and will need to be replaced. Product longevity can also be dramatically effected by factors including but not limited to location of installation (direct sun vs shaded area, higher temperature environments), proximity of location to coastal environments (salt spray), and close proximity to swimming pools (corrosive).
Larger play equipment items like trampolines and swing sets can take up a large area. A safe and clear area, normally recommended at around 2 metres, is essential around all sides of the play equipment. Assembled dimensions are available and listed in product details and on their packaging. If there is a specific product of interest call 1800 777 137 for assistance or email firstname.lastname@example.org. There is also additional information provided on the trampoline buyers guide on this website.