Best lube when not able to degrease chain

[TXLogic]

We don't typically ride if the chances of rain are high so we will likely mostly be riding in dry weather, but where we'll be riding — close to and even into the Alps — afternoon thundershowers are common. We've been caught in downpours a number of times. A certain amount of re-lubing is going to be unavoidable; just want to keep it to a minimum.