I/O Bio Merino base layers are super light weight and comfy, it feels like you’re almost wearing nothing at all. You put this stuff on and it is like nothing else I have worn before.
The entire io Bio Merino line is made of 100% Merino Wool. Need I say more?
This is by no means your normal jibber style clothing. I am getting to a point where I like more form fit clothing and I/O provides it.
At first I was skeptical of what super light clothing could offer. During testing I was at the top of Mammoth in 75 MPH winds wearing the Men’s Signature LS crew and my 3 Layer jacket and was fine in the extreme weather conditions. I don’t think I could have put it to a tougher test.
I will never wear any other first layer again. Granted the sticker price is high but if you are in the market for some high end high performance gear this is the stuff
I’ve been wearing the Mens i/o Bio Signature L/S crew for 3 weeks almost daily. This stuff so far is holding up. I hate to admit it but I haven’t even washed it yet and still no smell. Let’s see how long that lasts