Is the Hydrenalite Down Parka warm enough for real winter?

It is a down-insulated parka built for moderate winter cold, daily commuting and travel. For deep sub-zero stretches or long hours outdoors, a heavier expedition parka is the better pick.

How does it compare with The North Face's Nuptse or McMurdo parkas?

The Nuptse is a shorter, boxier puffer with more loft; the McMurdo is a heavier, weatherproof parka for harsher cold. The Hydrenalite sits in between, with a longer cut than the Nuptse and less bulk than the McMurdo.

Can I wear it in rain or wet snow?

The outer fabric resists wind and light snow, but it is not a waterproof shell. In steady rain, wear a waterproof layer over it or choose a rain shell instead.

Does it run true to size?

The fit is described as comfort-focused and roomy enough for layering. If you plan to wear only a t-shirt underneath, you may want to size down.

What should I wear under it?

A midweight sweater or fleece works well for most winter days. Add a base layer for colder mornings; the parka length covers the hips, so shorter jackets underneath are fine.

Is it good for travel?

Yes. The streamlined design packs reasonably and works for city days and resort evenings. It is not a compressible ultralight down piece, so it takes more bag space than a packable jacket.