Old Navy Gap White quilted design baby vest with zipper. - Brand: OLD NAVY - Size: 6-12M - Color: White - Design: Quilted - Features: Zipper Perfect for early spring. Vest types are great for babies when they are sitting, crawling, standing with support, or taking their first steps, as they don't restrict the baby's movements. The inside is fleece and warm, and the outside is quilted with 100% polyester filling, which seems to provide good insulation. Quoted from the internet ↓ Old Navy's "6-12M" size is for babies aged 6-12 months. In Japanese size notation, it corresponds to approximately 70-80cm (or around 75cm), and the weight目安 is approximately 7-11kg.