Icebreaker  200 Oasis Crewe Base Layer Top - Men's

I have been searching for years to find a moisture wicking undershirt which is made of non-toxic materials, ie, not polyester or some plastic derived fabric which leaches micro plastics and other toxins into the wearer, for my job in fire/ems. This undershirt is a bit pricey but so far it’s help up pretty well, I’ve made sure to only air dry it, and it does a good job of moisture wicking. It’s not a miracle product but it does better than the issued cotton undershirt I was using before. That’s pretty much all there is to it. The fit is good, runs normal to small, especially if you have a broad muscular build.

Great shirt! I chose small by the sizing chart, it's a little snug in the chest and somewhat 'revealing' (for a guy) but that is okay, I mostly wear this underneath all my other layers so the snug fit really helps trap heat and wick moisture quickly. High quality stitching.

Have holes after first use and first wash

Great alone for sunny days with just a bit of chill in the air or as a wonderful baselayer option when you do not want layers of sleeves. It makes for a great first layer under dress shirts as well for when the weather changes on you. I love how it is thicker than an every day t-shirt but not as bulky as a full sleeved baselayer. I will be picking up more of these for sure.

This is a good quality shirt. Just wish there had been more colors available. I would have gotten my hubby more of them.

I'm 6'6", fit of this shirt is spot on: somewhat slimmer fit, but not super tight. I use this and a few other icebreaker shirts for travel because they stay so fresh I can wear many times between washes. The fabric is slightly thicker than a standart T-shirt, but can still wear on warm days. I'd go down to a 125 or 150 level for anything above 85 F. Great for active pursuits and wearing around town.

[This review was collected as part of a promotion.] Purchased t-shirts for travel & outdoor activities. Waist size on the Merino 200 is less than 40 inches in circumference. For comparison the Merino 150 is 46 inches in circumference. Overall length from neck to tail is a standard 24 inches. I have two Merino 150's from Icebreaker and they fit fine. I have returned the Merino 200 t-shirts.

Whether layered under a flannel or as a standalone tee, this shirt is awesome. I wore one shirt for 6 days straight on a shoot in the Bolivian Andes last summer, and it held up great. I literally didn't take it off the whole time. When new, it was a bit itchy, but after a few wears I can't tell anymore. Would definitely recommend.

Excellent fit and great feeling tee shirt. I am 5'11" and 190lb and the size large fit perfectly

[This review was collected as part of a promotion.] I use this as a base layer for cool morning bike rides. Regulates body temps good during intense moments. Im 5'9", 41" chest, 162lbs. and med. fits very good. I could possibly try one size smaller for a tighter fit. Liv'n it!!!