Here's what other sites are saying:
If you're not warm enough, the human race might die out. Or at the very least, you'll, ummmm, get goose bumps. Lucky for all of us, the Arc'teryx Men's Phase SV CZ Bottom exists. The heaviest hitter in the Phase family, these long undies should keep you warm during your chosen cold-weather activity. The majority of this baselayer is made from Phasic SV, a warm and wicking material. Behind-the-knee panels are crafted from Phasic AR, which helps hot air escape so you don't overheat when you're boot-stepping straight up the mountain. A gusseted crotch and full-zip fly mean that come December, you can kick and scream your way through playoff games in Green Bay or Buffalo, and never leave your 50-yard line, field level seat, if so inclined. Flatlock seams minimize chafing during your mid-winter runs. Encapsulated silver ions reduce odor build-up on the fabric, just in case you can't find a washing machine for a few weeks.
- Backcountry.com refers to the men's version
The Arc'teryx Men's Phase SV CZ Bottom is a cold weather base layer for staying active through winter and mountain adventures. The next-to-skin Fit stays close to the body, allowing the Phasic AR and SV fabric to wick moisture away as you sweat to keep you comfortable for the whole trip. Move fast and the fabric will follow, whether you're bending at the knee while carving the mountain on skis or in a deep lunge going up the mountain, ice axes in hand. A through-the-crotch zip is just what you need for quicker calls of nature, so you spend more time staying warm instead of freezing while attempting to get a little relief. Features of the Arcteryx Men's Phase SV CZ Bottom Phasic fabric has soft touch and exceptional moisture management properties Hybrid mapping reduces bulk, improves thermal regulation Full crotch zipper mates with Alpha SV Bib CZ Flatlock construction improves next-to-skin comfort Provides sun protection (UPF 50+) Encapsulated silver ions reduces odour
- Moosejaw refers to the men's version
Arc'teryx's heaviest weight base layer bottom, the breathable and moisture-wicking Phase SV CZ Bottoms are ideal for cold temperatures and high-output activities.
- REI refers to the men's version