Marmot Boy's Ajax Down Puffer Jacket, Fill Power 600

The Boys' Ajax Down Jacket is a puffer style designed to keep your child warm in cold or damp conditions. This winter-ready jacket is insulated with 600 fill power down and protected with Down Defender—a moisture-resistant treatment that keeps the coat's insulation from clumping and losing its loft when exposed to wet environments, thus increasing its ability to retain warmth when the weather takes a turn for the worse. The Ajax is also outfitted with zippered handwarmer pockets to keep his fingers toasty, a wind flap to protect the front zipper from drafts, and elastic-bound cuffs that provide a secure fit and help to keep out the cold. Your child's arms will retain full mobility through it all, thanks to the built-in Angel-Wing Movement.

• Polyester