Obermeyer MicroFleece Tight - Toddler Boys': Flat seamed for maximum comfort and an interior wind guard for added warmth. Perfect as a base layer or second layer for added protection. Made with mom tested and approved high lofting wash proof fleece. Product Details Profile:ACTIVE Base Fabric:100% Polyester 100 Weight Micro Fleece Features Flat seaming for maximum comfort Elastic waistband