For those of us that like things natural, DeFeet has produced 2 distinct kinds of wool socks for our enjoyment. First was the Woolie Boolie (tell me you don't like that name!). It was an entirely new program for us - designed from the ground up with comfort, insulation, and dryness in mind. The Woolie Boolie could be easily described as a mid-weight sock. By mid-weight, we mean roughly twice the thickness of the Aireator. Like all our wool socks, it's made of superior quality Merino Wool. And for those of you who remember the sweaty 70s, this is nothing like the wool suits and sweaters you used to have... Merino wool breathes better than just about any other wool out there. Being a natural fiber, wool has intrinsic wicking capabilities understood only by sheep and wearers of DeFeet wool socks. Let's just say you have to wear them to understand. They're comfortable in the chill of winter and during the heat of summer. For those of you who immediately start scratching yourself when you think about wool, think again. These socks have been called some of the softest, most comfortable socks we make by many of our customers. OK, so maybe it's not really a life-changing experience... But it is a pair of socks you should try. I can't tell a lie... chances are that if you like our Aireators, you'll love the Wooleators! To put it simply, the Wooleators are basically an Aireator made of wool. They're made of the same superior-grade wool described above. They're thin and durable and come in two flavors - check 'em out below.