Knotty Ones / Kalvos: Tweed Merino Wool Vest / Size: S 100% Merino wool. Cruelty free. Kalvos merino wool vest came to life as the result of some scribbled crayon layers inspired by the rolling Lithuanian hills. One of our most versatile pieces, it's made from cozy Merino wool with a hip-length front and a slightly longer back. Its side ties and metal buckles add a little extra sophistication while its soft grey shade makes it great for layering on those cool evenings. Runs true to size. Recommended to take your normal size.