Increase jacket breathability

I would think washing it repeatedly might help slightly but be sure to wash with soap and not detergent.

There are reports of people here putting pin holes in whims shirts but I never heard if they found it made a difference.

It would probably take a lot of washing to accomplish that. I can’t think of a way to do so without damaging the fabric integrity in general.  Roughish sandpaper might do it, but again will shorten the life of the fabric.

A quick way to put holes in something is to use a non threaded sewing machine. With something as thin as the LSD fabric, you could probably fold it over a few times first too.

I’m surprised it’s so non breathable–i have an earlier version of the regular LSD (II i believe), and it’s quite breathable–more the 2012 Houdini’s we have.

I remember seeing I think some Adidas Running gear last year that had strategic breathability holes in the fabric (eg armpits of a windshirt). Probably some advanced milling technique. The holes were much larger than sewing machine pin holes from even a relatively fat needle.

A thought I had was that perhaps you could use a fat hot needle…so that you are kind of melting through the fabric as well as piercing it at the same time?

Unless you don’t care I wouldn’t do this on a jacket, risk of messing it up might be quite high. Also, time consuming…keeping lancing needle hot enough, one hole at a time by hand, etc.

Would be easier to just modify the jacket with some additional vents, such as pit zips (with or without the actual zips), etc. Take a look at some of the vents on Sierra Designs Elite Cagoule-they might give you ideas.