Pet Care, Toys, Supplies and Products for Animals Design FiFi Multifunctional Dog Collar by Frida Hultén This is not only a Dog Collar, it's a Dog Collar with a detachable necklace. Frida is using quality leather with solid brass. When designing this piece she had to consider a simple secure way of attaching the necklace while the dog is wearing the collar. The collar also had to have a luxurious feel without the necklace. With this design, a detachable necklace, the owner can adorn their dog when they wish.