Fred Perry Loop Back Military Green Sweat Pants. Elevate your look with these sleek Fred Perry sweat pants. The loopback fabric is both incredibly comfortable and lightweight. Enjoy a stylish look perfect for any activity, while the adjustable tiecord waistband will keep you comfortable all day long. Make a bold statement that never compromises on quality.. 1 Back Pocket, Cuffed Bottoms, Fred Perry Green Sweatpant. Drawstring Waistband, Elasticated Waist and Cuffed Leg, Loopback Sweatpants. Stripe Design On Back Left Pocket. Style Code: T2515 B57