How to Choose Base Layers

Seeking the perfect foundation for your everyday cold-weather kit? Made with merino wool jersey, the men's Icebreaker 200 Oasis 3/4 base layer bottoms are a worthy addition to any layering system.
$9
10% Reward
on this and every eligible full-price item*
+
$30
Bonus Card
valid for 60 days after joining*
=
$39
Value
Keep shopping
Imported.
View all Icebreaker Men's Base Layer BottomsBest Use | Multisport |
---|---|
Fabric | Merino wool |
Sun-Protective Fabric | Yes |
UPF Rating | 20 |
Moisture Wicking | Yes |
Quick Drying | Yes |
Fly Opening | No |
Underwear Weight | Midweight |
Inseam (in.) | 23 inches |
Gender | Men's |
Sustainability | Contains ZQ merino wool |
S | M | L | XL | XXL | XXXL | |
---|---|---|---|---|---|---|
Chest | 33-36 | 36-39 | 39-42 | 42-45 | 45-48 | 48-52 |
Waist | 27-30 | 30-33 | 33-36 | 36-39 | 39-42 | 42-46 |
Hip | 34.5-37 | 37-39.5 | 39.5-42 | 42-44.5 | 44.5-47 | 47-50.5 |
Measurements are stated in inches unless otherwise indicated.
CHOOSING THE RIGHT SIZE: If your body measurements are midway between two sizes, select the smaller size for a tighter fit or the larger size for a looser fit. If your body measurements result in different sizes, we recommend using your chest measurement for tops and your hip measurement for pants.
Adding a review will require a valid email for verification
Very thin material. Only had them for one year and already there's multiple holes in the groin and thigh area. Paid 100 for something that last for one year is ridiculous!
I switched from a heavy-weight synthetic nike baselayer to these for this ski season and love them. I wanted the 3/4 cut because my feet often get cold and figured it would help with bunching fabric. I run really warm, especially while skiing, so this has been the perfect weigh for me. They're super light and fit very well without being tight and restrictive (6'1", 230lbs, athletic build, 36" waist: XL purchased). I've put about 20 days on these, mostly resort skiing- some BC, and have had no issues or concerns with durability. Would highly recommend
Decided to get these to replace the REI version. These are much more form fitting. The REI are shapeless and extremely loose fitting. These are much better.
[This review was collected as part of a promotion.] I patrol at Winter Park and spend long days in my gear. These leggings are awesome for both cold and temperate days. The 3/4 leg length is good for ski boots and saves me from having excess material on my shins, under the boot tops . I've worn them on the front side and in the back country without over heating. The only design issue that needs to be addressed is the necessity of a fly so you don't have to pull down your pants to relieve yourself.
As a ski instructor I see every condition imaginable. This is my go to base layer bottom. I have always loved Ice Breaker products and this did not disappoint.
Fits as expected. Comfortable. The ¾ legs are perfect for Downhill Skiing. The wool is NOT itchy.
[This review was collected as part of a promotion.] I used these for skiing and they are the length as they come right above my ski boot.
[This review was collected as part of a promotion.] I use these leggings alpine skiing. The 3/4 length is a game changer with ski socks!
[This review was collected as part of a promotion.]