First thing’s first. You’ll need to make sure you have some self-adhesive, pressure sensitive repair tape or patches with you; these can be found at most specialist outdoor stores.  Some stores stock Gore-Tex repair kits with patches made from Gore-Tex fabric to match your jacket more closely.

Check out the hole. Cut any loose threads from around the hole.

3. Gently clean and dry the area to be repaired, remove any dirt or loose debris.  Avoid machine washing to stop the hole getting bigger.

Get your repair patch or tape ready.  If it needs cut to size then on the backside of the patch, draw an oval (or any shape really but make sure it has round edges). Make sure it is big enough to leave around 1cm of margin all around the hole.

Using scissors, cut out the shape ensuring any corners are well rounded.

Peel the backing off the patch without touching the sticky side.

Lay the patch on top of the hole, press it tightly against the fabric, and then use either your fingernail or for example a credit card (no sharp edges of course) to work out any air trapped between the patch and the fabric.

Apply pressure for a little while longer, and you’re all done!