Snoods are widely available on online commerce sites, such as Amazon and several craft shops on Etsy. Headcoverings by Devorah is another site that sells snoods online.
Traditional snoods function more like hairnets, gathering loose hair with a mesh, crocheted or fabric net and holding it close to the nape of the neck. Also known as cauls, these are often worn for religious reasons, out of modesty, by women undergoing hair loss due to chemotherapy or at historical re-creation gatherings such as a renaissance festival. More contemporary snoods are like tubular scarves that can be adjusted to protect the neck or face from cold weather.