The Callaway Women's Opti-Therm Base Layer Set is a top choice for female golfers who want to stay warm and comfortable on the course. This set includes a long-sleeve top and leggings, both made with Callaway's Opti-Therm fabric technology. The fabric is designed to trap and retain heat, keeping you warm in cold weather. It also has moisture-wicking properties to keep you dry and comfortable. The top features a mock neck and thumbholes for added coverage and warmth, while the leggings have a wide waistband for a secure fit. With its performance features and stylish design, this base layer set is a popular option for women's golf.