Osprey Atmos 50 waterproofness

[Dogginfox]

Just wondering about the waterproofness of the Atmos 50, anyone have any experiance with one in the rain?

[g8trh8tr]

I either carry a pack cover or combination poncho/pack cover with my Atmos 50. It is definitely not waterproof.

[bulldog49]

For extended or heavy rain you definitely need a cover or liner, but you can get by in light or brief rain without.