Cardigan Spikboo by American Vintage with round neck in the color black. The Spikboo cardigan by American Vintage is a cardigan with a round neck and buttons on the front. The cardigan has long sleeves and is slightly translucent due to the thin, soft fabric. An ode to simplicity, but with a fashionable twist: that's how American Vintage describes their own collection. Although they have many basic items in their collection, such as t-shirts, sweaters and knitwear, they always give it a 'vintage' twist, for a weathered touch. American Vintage is an ideal brand for the basic pieces in your wardrobe. You can find the most beautiful American Vintage clothing in the Schwung Amsterdam webshop.