Is the Ultra Re-Up warm enough for mid-winter resort skiing?

As a midlayer under a shell, yes. Jones rates warmth 9 out of 10, and the 750-fill down traps heat well for its weight. On its own in wet or windy weather it is not enough.

Can I wear it as an outer jacket?

Jones says it works as a mid or outer layer. Its waterproofing is rated 4 out of 10, so it handles light snow and wind but not sustained rain or wet snow. Pair it with a shell for storm days.

How does it compare with a Patagonia Down Sweater?

Both are lightweight down layers with similar fill. The Re-Up uses 100% recycled Pertex and upcycled 750-fill down and is cut as a layering piece. The Down Sweater has a more casual fit and is often worn on its own around town.

RENU is down reclaimed from used bedding and apparel and cleaned for reuse. Jones uses it at 750 fill power, so the jacket gets full down performance from upcycled material.

Does it come with a stuff sack?

The product details do not list a stuff sack or included accessories. Check the packed size if you plan to compress it in a pack.

How does the fit run?

Jones describes it as a regular fit meant to be worn as a mid or outer layer. That leaves room for a base layer or fleece underneath without feeling bulky.