Calming collars for dogs can effectively relieve destructive behaviors such as fear or stress caused by high temperature noise traffic travel veterinary visits pets alone fireworks thunderstorms separation anxiety and unfamiliar new environments calming dog collar for anxiety can effectively help your pet relax and make your Puppy feel comfortable. Calming Collar for All Dogs-60 Days of Continuous Calm Your Pets Immediate effect within 1 Hour quickly helps improve their bad behavior and reduce pet stress. Calming collars can imitate the parent pheromone and continue to release pheromones for up to 60 days. Safe harmless and not addictive. Dog calming collar for anxiety can be worn continuously and replaced every four weeks. Two size fits all just cut the extra length to create your dog s perfect fit. Dog calming collar is waterproof so there is no need to disassemble it when bathing or playing in the rain. Product Specification: Color: Purple Dimensions: 2*15 in / 65 cm; 2*27.5 in / 65 cm; Packing Quantity: 4 packs Nature Pheromones Lavender and Chamomile essential oils also help relieve tension and anxiety.