we all need a helping reminder occassionaly, for what it is and what it weighs, its worth going into your first aid pack
https://www.sja.org.uk/sja/support-us/the-difference/get-a-free-first-aid-guide.aspx
https://www.sja.org.uk/sja/support-us/the-difference/get-a-free-first-aid-guide.aspx