I bought a pair of these, they dont work all that well with my leather jacket, but work really well with my textile jacket, the reason for this is the leather jackets sleeve is quite loose and can not be tightened around the ventz were as the textile jacket can. Both these jackets let plenty of air flow in when the sleeves are loosened anyway, the only reason I bought the ventz was to stop things that want to bite, sting, crawl and generally make life uncomfortable for me going up my sleeve, so one jacket they do the other one they dont.