About size: Please measure your pet's chest girth in priority, and back length, get the right size based on KYEESE size chart. If your pet is still growing, or your pet has a stout body, please do size up Reflective yarn: Super reflective yarn throughout the sweater! Specially designed reflect dog sweaters, high visibility not only making your dog walking safely at night, but also preventing your baby from accidentally getting lost while walking at night Heavy-knitted: Made of thick and heavy acrylic yarn—soft, thermal, and ultra-cozy to keep your dog warm all winter long. The material is naturally stretchy, making it easy to put on and take off, suitable for dogs of all sizes. Available for small to large dogs: Designed with a wide size range, this sweater comfortably fits everything from small breeds to medium and large dogs. The stretchy knit adapts to different body shapes, offering a snug and cozy fit for dogs of various sizes. Long-lasting: KYEESE dog coats not easy to pill, holds up well after washing, you can just throw it into washing machine and dryer, saving your time Dog Sweater