Can this be used under a swing playset and then covered with artificial grass? Does it offer any protection for falls?

You can install our Eco-Flec Rolls under turf under a swing playset, but it is not fall-height rated and will not give you the optimal protection one would want for kids at play. We offer a number of foam pads that can be added under artificial grass that will provide you with a fall height rating that will ensure that your child will not get seriously hurt from a certain height. You can find these pads on our Turf Accessories page.