FOREST Attention Vest makes your dog visible in the dark. FOREST Attention Vest is very light. The velcro fastening on the chest and around the waist makes it easy to put on or take off as well as it gives plenty of adjustment range. The reflective tape all around makes the vest visible. Wash: 30 degrees Material: 100% polyester Note: The velcro fastening has been chosen for your dog's safety. If the dog's vest gets caught on something, the velcro gives in and lets the dog lose. Please also note that the velcro needs to be cleaned from the dog's hair from time to time to keep it working properly.