One Sock, Every Season Most sock drawers are split by temperature — thin cotton for summer, thick wool for winter, and a gap in spring and fall where nothing is right. These crew socks are built to erase that split. The working range is roughly 30°F to over 100°F, which covers most of the year in most of the country. That range isn't a marketing claim, it's a property of the fiber. Alpaca regulates rather than simply insulating: the semi-hollow core traps warm air when it's cold, and because the fiber absorbs so little moisture, it moves sweat out instead of holding it when it's warm. A wool sock does the first half well and the second half badly. Cotton does neither. The Specs Height: crew — sits at the lower calf Cushion: light to medium — enough underfoot for all-day wear without bulking out a dress shoe or sneaker Temperature range: roughly 30°F to 100°F+ Fiber: Peruvian baby alpaca blend with nylon and spandex Colors: gray and black Sizes: Medium (men's 6–9 / women's 7–9.5), Large (men's 9.5–12 / women's 10–13), X-Large (men's 12.5–15) Men's and Women's Unisex by construction, sized by US shoe size, so men's and women's ranges overlap inside each size. If you're between sizes, size down — alpaca relaxes slightly with wear and a loose sock is what creates friction. If Wool Makes You Itch Read this part carefully, because it's the reason a lot of people end up here. The itch in wool socks is largely lanolin — the natural grease in sheep's fleece — combined with a coarser scale structure on the fiber surface. Alpaca has no lanolin at all, and a smoother scale profile. People who've written off wool socks entirely are usually fine in alpaca. It's the closest thing to a wool sock that doesn't behave like one. Where They Fit Office and commute — crew height under trousers, not bulky in a dress shoe Weekend and casual — sneakers, errands, travel Shoulder seasons — the spring and fall stretch where a wool sock is too much and cotton is too little Travel — odor resistance means two to three wears per pair, so you pack fewer Questions People Ask How are these different from the Boot Socks?Boot Socks are mid-calf with max cushioning, built for 10°F to 60°F inside work or hiking boots. These are crew height with lighter cushion, built to be your default sock for regular shoes. Different jobs entirely. Do they shrink or lose shape?Not with cold wash and low heat. Alpaca has less natural elasticity than merino, which is why these are knit with nylon and spandex — a 100% alpaca sock would sag after a few wears. Heat is the thing to avoid; the washing machine isn't the problem. How many wears before washing?Most people get two to three. The odor resistance is real and it's the reason these end up in carry-ons. Are they too warm for summer?For a hot day in closed shoes, most people are still fine — that's the regulation working. If you want less coverage, look at the No-Show Socks. Care Machine wash cold, gentle, inside out. Tumble low or lay flat. No fabric softener — it coats the fiber and undoes the moisture-wicking. No bleach. Browse everyday socks or the complete alpaca sock collection.