yepThe only things I know of that could kill them would be lack of air, excessive heat, or excessive cold. I'm not sure if your spiders will arrive alive or not, but I do know that overnight shipping is often the best option. They may survive, they may not. I'm not sure, as I've only ever done overnight.
I was just wondering this myself. I live in a hot climate (100+ degree temps), so I'm having my slings delivered to work, but they'll get there around 11 am it'll be after 5 pm before I can unpack them. My seller says it takes 1-3 days for slings bought from her to arrive, so I would think yours would be ok too. Hopefully someone who ships Ts can come give a real answer (I searched earlier for this topic and didn't have any luck).
I live in south LA. Mine shipped out on a saturday, didnt get them to monday night and they were fine. I didnt unpack until monday night and they were both fine. IT got well over a hundred with some extreme humidity as well.
i hope they just fine in the packageThey'll almost certainly be fine, assuming they're packed well.
I know of instances where packages were in transit for two or three weeks and the spiders were ok.