Copripioggia ultraleggero

Stuffed it in my pack's side pocket and honestly forgot it was there until the sky opened up on a ridge hike. It shook out and covered my 45L in maybe ten seconds flat, and everything inside stayed bone dry. Sizing tip is real though — I went up and it fits perfectly.

I was skeptical about sizing but took the advice to go up a size and it fits my 55L pack perfectly, even cinched down over a sleeping bag strapped on top. Deployed it during a sudden downpour on the ridge and my gear stayed bone dry the whole way down.

The stuff sack is so tiny I almost forgot it was in my pack until the sky opened up mid-hike. Deployed it in about ten seconds and my gear stayed bone dry through three hours of steady rain. Went up a size like the listing suggested and the fit over my full pack is perfect.