The Assos Men's Black Spring Fall Skin Layer Long Sleeve Base Layer gives you that extra bit of warmth you need for those chilly mornings. Beautifully designed, this layer is made to provide wonderful insulation while still being breathable and light. Without side seams, this base layer is smoother and softer against your skin. The higher collar and long sleeves provide insulation against the chill. Every detail of this base layer has been considered carefully to keep you insulated while still allowing you to perform at your best.