“For our design proposal, we chose our materials based on natural fibers that environmentally friendly. The choice of natural fibers is due to the fact that they are a more natural and sustainable option than synthetic fibers, being a totally renewable resource. They are fibers that require less energy than synthetic fibers, and are a biodegradable option. The ropes we have used are 100% recycled cotton certified by the 100 Oeko-tex standard, certifying that they do not contain any harmful substances, neither for health nor for the environment thus combining it with the sustainability of natural fibers. The production of the carabiners and rings is also carried out using the a 3 D printer. They are pieces created from PLA, an ecofriendly material that takes only 2 years to degrade because it is obtained from natural resources. A polymer produced from lactic acid that makes it a more sustainable and biodegradable material.”