Material: Made of 100% premium cotton, soft, comfortable, breathable and safe. Season: for Summer. Size: Optional sizes: newborn/0-3 months/3-6 months. Newborn: up to 20.5" height and 5.5-10.0lbs weight; 0-3 months: 20.5-23.5" height and 7.5-13.0lbs weight; 3-6 months: 23.5-26.0" height and 12.0-17.5lbs weight; 6-9 months: 26.0-28.5" height and 16.5-22.0lbs weight; 9-12 months: 28.5-31.5" height and 19.5-26.5lbs weight; 12-24 months: 31.5-35.5" height and 24.0-30lbs weight. Since different babies have different shapes even in the same age. Please choose the right size according to baby's height and weight. Design: 1.Snap button for easy diaper changes. 2.Solid color, stripe texture. 3.Thin design, breathable. About COBROO: COBROO was founded in 2002 and the brand was registered in the United States in 2014. We have devoted more than 10 years to offer premium baby apparel and will try harder in the future. Most of our products are made of 100% cotton for baby safe&comfortable dressing, and all in elaborate&unique design from our excellent designers. Please don’t hesitate to contact us if there is any question or problem when you receive our products. Package details: 1 romper, 1 sweatband(free gift).