As seen on BBC TV Dragons' Den, Illuminated Apparel are on a mission to create interactive, innovative products that make every day fun for the whole family, with no mess and no stains - perfect for gifts, birthday parties and festivals, popular with adults and kids alike. Draw on your Glow in the Dark T-shirt with light, using the Glow Torch (included) or a Mobile Phone Torchlight. Your designs will last for up to 5 minutes, so you can make designs over and over again. 100% Cotton & Machine Washable. Size Guide chest: age 5/6: 26/28inches age 7/8: 30/32 age 9/11: 32/34 12/14: 34/36 small: (mens) 34/36 (ladies size 8) medium: (mens) 38/40 (ladies 10-12) large: (mens) 42/44 (ladies 14/16) x large: (mens) 46/48 (ladies 18-20)