Make Every Day Playable with FJ Performance Mid-Layers FJ Mid-Layers are versatile pieces that allow the player to adapt to changing weather conditions. The four-way stretch material helps keep your core warm while allowing free range of motion throughout the golf swing. Fleece lining for body heat retention 4-way stretch fabric for unrestricted range of movement 90% Polyester : 10% Spandex 4-WAY STRETCH For comfort and complete range of motion during the golf swing. THERMAL INSULATION Fleece lining to keep you warm throughout your round. EASY CARE FABRIC Machine washable fabric with minimal wrinkling or shrinkage.