Are these pants warm enough on their own?

Yes for typical resort temperatures. The synthetic insulation handles cold lift days, but on very cold days most skiers add a thin base layer. In spring conditions they can feel too warm.

Do they run true to size?

They run on the trim side. Owners commonly report a snug fit through the hips and thighs, so consider sizing up if you layer underneath or prefer a looser fit.

Are they fully waterproof?

Yes. The two-layer Gore-Tex membrane is waterproof and windproof, and seams are sealed, so wet snow and rain roll off rather than soak in.

What is the RECCO reflector for?

It makes you detectable by resort and mountain rescue RECCO detectors in an avalanche burial. It is a backup for rescue, not a substitute for a transceiver, probe and shovel.

Can I wear them without ski boots?

Yes. The leg openings and zips work over boots, and the pants are fine for snowshoeing or winter walking, though the insulation and fabric are tuned for skiing.

How do they compare with a shell pant plus insulated liner?

The Lightray is simpler and lighter than a shell-and-liner setup and has fewer pieces to manage. A shell plus liner is more versatile across seasons and lets you shed warmth on warm days.