Single jersey knit with light brushing delivers soft, broken-in comfort; Midweight thermal fabric provides reliable warmth without added bulk; MTF polyester fibers move moisture away to help keep skin dry; Breathable construction supports airflow while maintaining warmth; Plush-back elastic waistband offers secure, comfortable all-day fit; Gusseted construction enhances mobility and reduces seam bulk; Flat seam design improves durability and long-lasting seam strength; Relaxed fit allows easy layering under pants or winter outerwear; Versatile thermal bottoms suited for sports or everyday activities; 100% polyester fabric built for warmth, comfort, and durability