Heat-Sealed Sidelock Zip Pockets. Keep 6.1'' phone and pocket items secure and out of the way when training. , Size Guide UK S(Waist:25-29"),M-(Waist:28-32"),L-(Waist:31-35"),XL-(Waist:34-38"),XXL-(Waist:36-41"),if you prefer loose fit ,please choose a bigger size , 65% Cotton, 35% Polyester , Fastening: Drawstring , Jogger , Skinny , Causal Leg Zipper :keep your legs tight,so pants won’t affect the movement, also can release pressure after training,provide a skinny look.