The Arc 3 offers the most efficient use of space for this type of product. The 3 pole design not only provides a feeling of space and comfort for your child, but it also gives the frame incredible strength, making it ideal for outdoor use as well as for travel. The Arc-3 uses lightweight aluminium poles, ultralight ripstop fabrics and mesh panels for breathability on the sides and top. Whether you are using it inside or outside there should be a good flow of air.