Woollow all natural alpaca crew socks are flat knit so they aren’t bulky in your shoes.They are made from alpaca so they can be worn year round- they keep you cool in the summer and warm in the winter. Alpaca has superior wicking ability keeping your toes dry even when standing in water!. Woollow socks keep you super comfortable for long hours. They have superior softness. Made in our sock mill on our southwestern Pennsylvania farm. Designed by a podiatrist for optimal foot health and comfort. Great gift for someone who enjoys walking outdoors or just relaxing indoors. They also make great bed socks if your feet tend to get chilled while sleeping.