Cheer on Your favorite driver this season in this Jimmie Johnson #48 Kobalt Performance Polo by Under Armour! Features driver number and UA logo. HeatGear moisture transport ensures lightweight performance and long lasting comfort with 50+ UPF that protects skin. ArmourStretch improves mobility and accelerates dry time with lightweight fabrics built in a 4-way stretch. Anti-Odor Technology prevents the growth of odor causing microbes.