These are extensions that can be easily attached and detached. Attachment hooks (1 new and 1 used) 6 extensions (1 new and 3 used) These will be listed as a set. These are feather extensions. They are very light, and my dog doesn't feel uncomfortable wearing them. I impulse bought them from Pet Eco and have been storing them. Although they are new, the packaging shows signs of deterioration. Please refrain from purchasing if you are sensitive about items kept in home storage. REPLUS Panash