Craft Size Chart The Warm Comfort LS is a functional baselayer jersey with a casual feel made of thick, warm and very soft polyester fabric. Designed for low- to mid-intensity workouts in cold conditions. The flatlock seam construction makes for a no-chafe fit during your workouts. Features: - Flatlock seams - Soft terry loops in on the inside for extra warmth and insulation - Fitted - Fabric: 95% Polyester, 5% Elastane