Great for Snowboarding
I am an Icebreaker convert and wore this for seven days straight while snowboarding in Colorado. It kept me warm in a wide variety of spring skiing conditions and didn't even pick up any body odor at the end. I really love the thumb loops to help keep your hands and wrists warmer. If you haven't tried any Icebreaker yet, you are missing out!

Lightweight warmth
Icebreaker products are known for quality - these lightweight long underwear bottoms are well made, comfortable and can be used many times between washings as they do not absorb odor. I bought them for ski trips so I can pack light. They are warm enough to wear under shell pants in moderately cold temps; not suitable on a very cold day unless under insulated ski pants. I am pleased with these leggings and recommend them if you can handle the price (or get them on sale). They are exactly what I hoped for when I was searching for quality long undies.

Love the Ice Breakers
My husband and I both have these leggings. My husband has the 360's and these 260's. They are smooth and fit well under his clothes. He loves that they do not bind. The 260's are thinner than the 360's so he loves that he has both pair. He works outside and moves a lot so we will not be going back to the discount store for long underwear any more. We both wear these on our motorcycles and they are super nice. To keep these nice, I wash them in cold on delicate cycle and use only organic soap and then I hang them to dry. They do tend to get linty but a roller brush will solve that problem.

AWESOME! No itch warmth!
The Icebreaker Men's BodyFit150 Legging is a great lighterweight legging. Works perfect with a softshell pant for sub freezing running. Love the no itch merino!

Long John Merino
fits like the normal long johns of yester-yore. has enough bagginess in the crotch to wear boxer briefs underneath them. Long enough for my legs and you really don't even know they're there. Very thin, good for the moisture wicking, but I'm thinking of getting something thicker for the colder months. Durability seems fine, but I would be very careful, just because of how thin the material is. You can see through it if you hold it up to the light, but I guess that's the case for most materials. I am 6 feet tall, 35" waist, 33" inseam, and I ordered the Large and it fits how I like my thermals to fit. Haven't went commando in them, so don't know about the no-itch aspects of the nether regions. Doesn't itch my legs at all though. Recommended.