Features: 1. Adjustable Size: the length can be suitable for most dogs and cats, and you can adjust the length according to your dog's neck, ensuring the comfort and it will not fall off. 2. Hypoallergenic: the healthy materials (30% essential oil, 70% TPE) and adding non-allergenic ingredients, don't worry about pet allergies. 3. Persistent protection: Normally, this product lasts for up to eight months. 4. Waterproof: even in the water, the collar also can work and the protection time does not decrease. Descriptions: Prevention: in the coming spring, there are various bacterial parasites to start to come alive. This collar can help pets to prevent them so you can take your pets for a journey more safely. Specifications: Item Type:Pet Flea Collar Color:Grey Material:TPE Quantity:1 Pcs/lot Size:100*20*5mm Package type:opp bag package ,iron box package (optical0 Package include: 1* Pet Flea Collar