Material:95%Cotton,5%Polyester And Comfortable to Wear. Cute cartoon clothing set. Machine wash or hand wash available. Season: Spring,Fall,Winter.Soft and Comfortable Fabric. Robot Pajama Set. Gender:Little Boys. Suitable for 2-7 years little boys. Package include:1 x Long Sleeve T-shirt + 1 x Long Pant Unit:inch (Please follow the size chart to choose your baby size!) Size:2Years T-shirt Length-14.1" Chest-22.6" Pant Length-20.3" Waist-14.8" Size:3Years T-shirt Length-14.8" Chest-23.4" Pant Length-21.1" Waist-14.8" Size:4Years T-shirt Length-15.6" Chest-24.2" Pant Length-21.8" Waist-15.6" Size:5Years T-shirt Length-16.8" Chest-24.9" Pant Length-22.6" Waist-16.4" Size:6Years T-shirt Length-17.9" Chest-25.7" Pant Length-23.4" Waist-17.2" Size:7Years T-shirt Length-18.7" Chest-28.1" Pant Length-24.9" Waist-17.9" As a mother,I always choose the best for my baby!