roundball said:
Personally, I'd rather be safe than sorry and when I take them out of the wash, I lay them out on plastic again while they're still wet, and drench them all over again...that's just me.
Although there is no doubt toxicity is low, it's not zero, and it would be wise to avoid more exposure than is absolutely necessary. The National Pesticide Information Center says as much on their permethrin page:
"Always follow label instructions and take steps to minimize exposure."
Absorption through the skin is very low, but it is much higher when either ingested or inhaled.
Spence