Double Dutch jump roping is a fun activity that requires skill. The activity is mainly played for recreation and for competitions. Industry has neglected to see the vast number of benefits in this activity, such as enhanced cardiovascular system, improved coordination and agility, and it is generally a very entertaining activity. The main limitation in the sport is that much of the skill comes from being able to turn the ropes.
Material fluid permeability is an essential quality measurement in a variety of industries including textiles and papermaking. Permeability in itself is related to the porosity, density, and thickness of a material. Consistency of these material properties over time is required within a process as an indication of the quality. The purpose of permeability measurement is to accurately indicate the quality and consistency of a material product.