A variety of wound dressings (sometimes call Ambulance dressings) should be kept wrapped in sterile packaging.
They come in various sizes to suit different sizes of wound, so it makes sense to keep a few in different sizes.
Keep an eye on the expiry date on the packet. After this date the dressings may no longer be sterile!
You will be shown how to use these properly during your ‘face to face’ session with your trainer.