Brilliantly designed sleep sack with adjustable arm snaps so you can truly use it for up to two years. Made from organic cotton (outer) and merino wool (inner lining). Because merino is temperature regulating, it works all year round. Size: 2-4 years (approx 34-42 inches, 26-42 lbs) Color: "Birch Gray" (more of a beige than gray) This was well-loved by one child (for ~1.5 years) but is still in good condition with plenty of life left for another family. For full transparency please see the last 3 photos for minor flaws found - inside label fading from washing, small run in inside fabric, small tear at bottom of zipper - none of these flaws impact functionality. From smoke-free and pet-free home. Washed many times, but always separately with wool-safe detergent and dried on low or no heat.