Description of Hot Chillys 4086 Ankle Bottoms - Kid's Building from the base layer up, Hot Chillys currently offers body fit and relaxed fit performance apparel featuring the best moisture management and high tech fabrications available for every season and activity. Features: MTF Original II sized for kids in the can is a great baselayer for growing kids Rated an 8 in warmth it is the warmest of midlayers Lycra in the fabric, these tops and bottoms stretch to fit Made of a soft polyester that feels like cotton yet moves moisture away from the skin to keep kids warm and dry