【Ultra-Soft Fabric】: The viscose from bamboo baby sleeper provides ultimate comfort and breathability, 30% more stretch and soft. Snug fit, gentle on delicate skin 【Fold-Over Mittens and Foot Cuffs】: The baby boy pajamas feature fold-over mittens to prevent scratching, and convertible footie cuffs to Keep your baby's hands and feet warm and cozy at night 【2 Way YKK Zipper 】: Enjoying effortless diaper changes without full undressing, dual zipper guard from the neck to the bottom prevents irritation and scratches 【Non-Slip Design】: The long sleeve baby sleeper romper for size 6-12,12-18 Months features non-slip grips on the foot, providing safety and stability for new walkers 【Seasonless Wear】: the footless baby pjs keeps baby warm in the cold months and comfortably cool in the hot months, making it prefect for spring, summer fall and winter About Rayon from Bamboo: It’s one of the most renewable and sustainable materials on the planet.It repels odors, wicks moisture, stays cool, and is unbelievably soft. It can even help prevent skin irritations. About Size: Our rayon from bamboo romper is a little longer than the cotton romper.Please don't worry,this is to leave space after the foot cover is turned over.