A surgical mask is used inside the operating room or during other sterile procedure areas to protect the patient environment from contamination. Surgical masks have ties so that they can be adjusted for fit, and are tied over the top of a surgical or bouffant cap.
rockfall. 1  an act or instance of the falling of rock, as in a cave-in or an avalanche. 2  a mass of rocks that have fallen: to be trapped under a rockfall.
Free climbing means using one's hands and feet to ascend a rock's natural features, employing ropes and other gear only to stop a fall. At roughly 3,000 feet (915 meters) tall, the Dawn Wall comprises 32 pitchesâor 32 rope-lengthsâof climbing. Caldwell's and Jorgeson's goal was to free climb all 32 pitchesâwithout falling and without returning to the ground in between.