Lofted lightweight neck warmer for cold weather, made from recycled plastic bottles. PrimaLoft® fleece keeps warmth in and sweat out. Stay cozy and dry in all your winter activities. *Just on Solid Colors. PrimaLoft® Bio™ Fleece is biodegradable and is designed to return to nature. Warm flece fabric provides warmth with an extremely soft and gentle feeling. Designed for protection and comfort. Specifically designed for children: designs, sizes and technology focused on the comfort and protection of the youngest ones.