Maybe I'm just not a laundry person (good thing I'm married) and I didn't think of this right away. If you have Sprawls or any shorts with velcro, when you put it in the wash, tie up the shorts and close the velcro or the velcro will stick the flex band and pill up the elastic material and I bet in time it will ruin it. Just a tip, I don't if I wasn't the only one remember think about it until after I washed it.
make sure the velcro is secured and tied anyway when you put it in the wash with your rashguard as I found out
Not sure why, maybe the heat is no good for the flex material. On the originals it has no such special instructions but on the flex ones it says not to dry in heat.
i got a pair the day they came out...and i had to stop drying them. The fabric just turns shit after enough drying.