Columbia Boys 4-18 Alpine Action JacketThis warm, waterproof winter jacket features progressive technology and all the bells and whistles to keep them warm and protected on the mountain including insulation and body heat trapping thermal reflective technology, waterproof breathability and special Outgrown cuffs that can extend to accomodate for growth over multiple seasons. Omni Heat thermal reflective lining retains body heat while breathing for long lasting warmth without bulk Omni Tech