Thickened cloth with heat insulation coating on the back has better heat insulation and sound insulation effect, which can block 100% ultraviolet light and sunshine. The safety of buckle to hold the beads are not easy to be touched by pets and children. At the same time, the use of safety buckle Settings will be quickly disconnected in case of pulling to protect pets and children. After the disconnect, the beads can still be connected and reused.