- Semi-relaxed, knee-high fit baseball pant features 100% Polyester Circular Knit 150 cloth with 2-way stretch for flexible durability. Pro Dri with moisture management and stain release for long-lasting comfort and performance. Pro style features gripper elastic waistband, flat-lock stitching and pocket tie-downs. Zipper fly front with belt and tunnel loops and 2 set-in back pockets for a professional looking baseball pant