Due to the possibility of fractures (commonly occurring on the tibia and the ankle mortise), it is recommended that parachutists wear supportive footwear [REF].
As parachuting is an aviation activity under the visual flight rules,[REF] it is generally illegal to jump in or through clouds, according to the relevant rules governing the airspace, such as FAR105[REF] in the US or Faldskærmsbestemmelser (Parachuting Ordinances)[REF] in Denmark.