Warm and smooth winter overall in a durable wind and waterproof material with good breathability it has a water repellent finish fully taped seams and flexible padding with very good insulating properties that keeps the baby warm the lining closest to the skin is fleece that wont pill legs and arms have twisted seams to reduce wear and tear and are pre bent for better mobility adjusting the waist keeps the crotch from dropping which increases the mobility even more the collar with soft