Otherwise, there's no question in my mind that an igloo—or a snow cave, for that matter—is in most ways superior to a tent. They're warmer, immune to all but the stiffest winds (plus, no annoying tent-flapping), and bigger (or, they can be). The Icebox Igloo kit, which weighs about five pounds, is also lighter than most four-season tents, which typically weigh eight to ten pounds. And of course an igloo kit costs less than a four-season tent such as Mountain Hardwear's Annapurna ($425; www.mountainhardwear.com).
The disadvantage, of course, is that you make it to a campsite, it's getting dark, it's cold and snowing, and you have to spend several hours building an igloo. Ugh. Plus, no matter how you slice it, you're going to wind up groveling in the snow while construction is underway, and you're apt to end up damp and cold. And that's why tents remain popular. They're chilly, flap in the wind, and in some ways fairly flimsy, but five minutes after you reach camp you can be inside.
So there you go. I've camped in tents, igloos, and snow caves, and each has its advantages. But by all means, give the Icebox Igloo a try—I think you'll like it.
For more luxurious snow digs, check out Outside's 2005 Snow Report for the year's most ritzy retreats.