This Reima Lani kids’ thermal base layer set is crafted with innovative Thermolite® technology to efficiently wick moisture away from the skin, keeping kids warm and comfortable through every winter adventure. Made from 100% polyester with flat seams for added comfort, this award-winning set is ideal for everything from building snowmen to exploring the slopes. Available in a wide size range, this “Best in Test” base layer provides reliable performance for toddlers up to teens.