100% polyester reflective fabric with reflective tape and velcro fastening. Size: Children 5-10 years old, XS (36 x 44 cm) Chest circumference 40-82 cm. Length 100-140cm. Certified according to EN 17353:2020 Class AB3. The reflective vest provides better visibility in the dark and is ideal for walking, running or cycling. Put on a reflective vest before going out into traffic. Make sure the reflective vest is fitted correctly and fits snugly against the body without being too tight. Do not wear clothing or backpacks over the reflective vest.