As a cold-weather walker, I've adopted a policy of not carrying on my back what I can wear on my back. The
Altus is stable in wind, and can also be converted to a simple long coat. I think there's a strong case for using it as the wind layer. Won't be as good dedicated windbreakers, Goretex etc, but, if combined with some smart layers, it should do the job. As bonus, it covers much more of the body than any jacket.
I've also decided that, since I'm such a slow and waddly walker, I may be able to go without trekking poles. This means I can tuck my hands into the sleeves of the
Altus in wet weather. I really don't like exposing my hands to rain and cold, no matter what gloves I'm wearing. Of course, people who aren't slow and waddly will want their trekking poles. In that case, the sleeves of the
Altus are pretty generous and one can draw them over most of the hand while poling.
An
Altus can sell for as low as 30 euros. If it cost 300 euros...I'd still have to at least think about owning one. It could be improved without sacrificing simplicity, and I hope that happens one day.
Therese, for June I'd say it's a no-brainer to combine
Altus with ice-breaker. One can still have severe cold-snaps at that time, but I certainly wouldn't be shy of leaving the wind-breaker at home. Mind you, I have no experience of a summer Camino, so the opinion of others may be needed.
Lastly, I saw heaps of
Altus on sale in Saint-Jean.