Cobweb

Roman soldiers dressed wounds with cobwebs.

An inch-thick rope of spider's silk can withstand up to 140,000 pounds of pressure.

By Stephencdickson 

William Shakespeare shared the common belief of the time that cobwebs have a magical medicinal property that stops wounds from bleeding. In Midsummer’s Night Dream Act 3 Scene 1 he has Bottom say “ I shall desire of you more acquaintance, good master cobweb; if I cut my finger, I shall make bold with you.”