【Safe & Secure】--- (1). Breathable Mesh Chest Vest Harness: Our harness wraps around your pet's body and neck, providing a secure fit that prevents them from roaming the car or hopping into the front seat. It's a great alternative to a collar. (2). Elastic Safety Dog Seatbelt: it's made from durable nylon strap to protect the dog which is elastic and adjustable and it is long enough to let your pet move around in the back seat and lay down. 【Breathable & Comfortable】--- Designed with double-layer breathable mesh fabric and a padded edge, dog seat belt harness for car offers extreme comfort for your beloved pet. The wide fabric area in the chest helps relieve pressure and prevents choking. 【Adjustable & Easy to Use】 --- The harness is easy to put on with two buckles on the chest part, and the four adjust buttons on the harness strap make it easy to adjust for a comfortable fit for small, medium, and large dogs. The breathable mesh chest vest harness is adjustable to relieve pressure and fit your pet perfectly. 【Wide Application】--- Our harness can be used as a travel harness in the car to prevent your pet from jumping out the window while driving. It can also be used as a regular harness. 【6 Sizes Available for Great Fit】--- Our seatbelt for dogs in car offer multiple sizes from XXX-small to large, ensuring the perfect fit for your dog. Please refer to the measurement instructions in the image to measure your dog's neck and chest before purchasing. IF BETWEEN SIZES, CHOOSE IT BASE ON CHEST SIZE! How to choose the right size harness? 1.Please kindly measure your pet dog’s neck girth and chest girth before purchasing. 2.Please allow 0.5-1 inch error due to the manual measurement. 3.Here are the Harness Size Guide for your reference: XXX-Small --- Neck girth (8.6-10 inch),Chest girth (11-13 inch) XX-Small --- Neck girth (10-12 inch),Chest girth (13-17 inch) X-Small --- Neck girth (11-14 inch),Chest girth (16-18 inch) Small --- Neck girth (14-18 inch),Chest girth (17-21 inch) Medium --- Neck girth (17-25 inch),Chest girth ( 21-29 inch) Large --- Neck girth (21-31 inch),Chest girth ( 25-37 inch) Elastic Safety Seat Belt : 20.87 inch - 29.13 inch x 0.98 inch (L x W) Outstanding features of the Lukovee Dog Car Harness Plus Connector Strap: 1. Multiple design and shape is our innovative collocation to be great for your traveling with your puppy dog. 2. The material we adopted are the tough durable nylon fabric belt and the double mesh fabric vest harness strap, which can be a great protection for your dog. Why choose the Lukovee seat belt for dogs in car? 1.The harness strap is designed to be universally compatible with most standard vehicles while securely keeping your pet in place for safety traveling. 2.This multi-functional harness belt not only can combine pleasure with treatment during the journey, also can be a collocation with the retractable dog leash. Package Include 1x Breathable Mesh Chest Vest Harness Strap 1x Elastic Safety Seat Belt Warm Tips: 1.Please measure your pet before your purchase. 2.Please take each measurement a bit loosely, so there will be room for your pet to move and breathe.