Hot Chillys Bi Ply Crew Kids Black Medium Thermal Base LayerPepper Bi Ply Is A Midweight Soft Jersey Knit With A Double Layer Of Back To Back Mtf Micro Spun Polyester That Provides Exceptional Thermal Properties And Added Moisture Management. This Fabrics Special Two Layer Knit Traps Air Creating Warmth And Comfort While The Flat Seam Construction Allows For Seam Strength Without Abrasion. The Hot Chillys Bi Ply Crew Kids Black Medium thermal base layer is designed to keep young adventurers warm and