Odd that these(Carhartt Force High Performance) socks are not available on the manufacturer/company's(Carhartt) website! Also odd and unfortunate that no multi-packs are available. You do only get just 1 pair of socks.

I want to see more clothing products like this one - materials engineered and thought out with each part of the product looked at with a purpose in mind and made by people who are making quality not low manufacturing cost products. Others(most "designer" brands) just make their product "99% basic polyester" at an outsourced manufacturer with a "cookie cutter" design and stick their colorful logo/emblem/trademark on it somewhere.

I was looking for socks that I could wear in work shoes that are smaller than boots during the Summer/warm(and humid) months in facilities that could be called industrial which have limited air conditioning. Before I usually wore the "designer" brands and was disappointed. I was looking for socks that potentially have the light partially synthetic material "Rayon" in an upper layer to allow air to circulate and cool my feet with a reinforced heel and toe area. I bought a pair of these socks recently(April 2018) to try out even though they are expensive. I have only worn them a couple of times(during the recent "abnormally warm days"). This is my experience up to this point:

The positive:
+ Base(upper) material on the upper side is soft and actually does feel like Rayon although it does say Polyester according to the packaging(materials: 49% Polyester[I think it is a blend with something else - it does not feel like normal polyester], 38% Nylon, 11% Acrylic, 2% Spandex).
+ My feet in my shoes(again not boots) do not get sweaty even after being on my feet for several hours.
+ Mesh(mini-net) type side vents engineered into the sock.
+ Upper "stretchy" fabric part feels like it is made out of Acrylic which is about as soft as wool(but can feel warm - luckily it is at the opening near the ankle) and they(Carhartt) use it for their Winter hats(which I reviewed earlier).
+ The bottom heel and toe area is reinforced with(I am assuming here) Nylon.
+ I normally wear a men's size 10.5 or 11 shoe and I have not had issues putting these size "L"(usually 6-12) socks on(I don't know about you guys or gals with shoe sizes less than 9[or more than 12] - the size "L" socks may be too big[or fit like "No Show" socks on a size 12]).

The negative:
- Cost. But they are NOT outsourced(as of Spring 2018).
- No Cotton of any type.
- Acrylic and Polyester seems to be "extra" sticky to "Velcro" type strips on my pants and shoes/sandals. Potential for rips and pulled out fabric if not careful.
- No "quarter sock" version of this sock for hiking type shoes.
- The (mostly synthetic) materials/fabric on the bottom of the sock begin looking "worn and used" sooner than my other mostly Cotton Carhartt socks after only several days.
- Still have lint although not as much as other socks.
- Carhartt uses that annoying plastic mini-cord to attach their socks to the packaging, need to be careful and use scissors to cut it or you will rip holes in your new socks if you try to pull them out!
- Because of all synthetic materials I may have to change washing routine with "air" drying for these socks.

These are definitely warm weather(Summer) socks. I don't know how long they will last(before developing holes) - only time will tell. No calves were hurt while wearing these socks.