From the TOFT website: 

TOFT pom poms are a famously fluffy accessory that adds luxury to ANYTHING, making it that little bit more special. These pom poms are part of our range of interchangeable alpaca fur pom poms and are sure to brighten up your wardrobe all year round.

To attach, simply remove the outer snap and securely sew onto your piece using the large holes. Then snap it together with the pom pom of your choice! All the pom poms have the same snap system so you can easily swap between colours. To wash, remove the snap with the pom pom and re-attach once your piece is dry.

Note 1: Colors marked with an asterisk have a string attachment rather than the standard snap attachment. 

Note 2: Alpacas are not killed for their fur. The alpaca fur products stocked by TOFT are made from the skins of young alpacas which have unfortunately died through natural causes in Peru. Alpaca pelts are purchased from indigenous farmers and used to create items such as these alpaca fur pom poms. We feel that alpaca fur, when sourced in this way, is an ethical fur product as the alpacas are not harmed to any demand and the farmer gets a monetary return on the loss of income cause by the death of one of the herd.