Hole in your down jacket or windbreaker?
Self-adhesive nylon patches are an incredibly easy and affordable way to repair clothing.
Cut out the piece you need (preferably a circle or oval, as corners are more prone to lifting) and stick it over the hole.
Make sure the garment is clean, and if it's a hole or a slightly larger tear, it's a good idea to sew it up a bit first.
If you're sewing, I recommend not gathering the hole tightly, but rather just sewing around it and tightening it slightly to hold it in place, or possibly taking a few stitches across without tightening. If you tighten too much, you'll pull on the fabric which can lead to wear and tear, in addition to the puckering from a gathered hole making it harder for a patch to stay on.
These can be gently ironed for a more long-lasting effect if the garment you are repairing can tolerate it. You can also use a hairdryer for heat treatment if the garment cannot withstand an iron. Make sure to start with low heat and hold it a distance away so you don't melt the original garment!
The patches work best on thin fabrics with similar textures, but can also be used on thicker rainwear and winter clothing, though they won't be as durable.
A garment repaired with this can be washed at 40 degrees.
Each patch measures 10x20cm