In stretchy (a.k.a. super comfy) cotton, these cute Baby Vests are ribbed for extra warmth and have added length to make tucking in totally easy. For even more comfort, Bonds baby vests are side seamfree so nothing will dig into your little one's skin. PLEASE ADVISE IN YOUR PERSONAL SHOPPER NOTES YOUR PREFERRED SIZE WHEN REVIEWING YOUR ORDER AT CHECKOUT. PLEASE NOTE THE SIZE DELIVERED IS SUBJECT TO AVAILABILITY