GO ORGANIC - Incredibly soft organic cotton-rich fabric features just the right touch of spandex for easy movement. FRENCH TERRY - Lightweight, breathable fabric transitions well from season to season, making it a great layering piece. SO SOFT - Comfort seams lay gently against Baby skin. LONGER WEAR - Expandable cuffs adjust for added flexibility as baby grows while side panels move and stretch along with baby. SAFE & EASY - Our protective zipper guard keeps zipper away from Baby skin, while making changing outfits a breeze. TRADITIONAL SIZING - These jackets are available in classic sizes, including 3 months, 6 months, 9 months, 12 months, 18 months, and 24 months.