Heirloom worthy. This is a heritage-feeling sweater knit in Peru from one-hundred-percent alpaca wool. The Peruvians are especially skilled at this kind of link stitching, which gives a wavy texture on both sides of the knit and yields a springy texture. But just as special as the stitch and the provenance is the material… alpaca wool is cool for about a zillion reasons. It's soft and lofty, yes. And incredibly lightweight. Its fibers have a hollow structure that allows it to adapt to your body temperature by retaining heat only when you need it, and wicking away moisture when you don’t. It's naturally antimicrobial, odor-resistant, and also highly renewable… alpacas have a lighter environmental footprint (literally) than hooved animals like sheep and goats, making their wool more sustainable overall than merino or cashmere. In our book, it's one of the coolest fibers on the planet.