Tufforce Multi Purpose Shooting Rest Bag with String Control, TL-SB023 TufForce Multi Purpose Shooting Rest Bag with string control, TL-SB023F Filled size: 3.5" x 4" x 6", wide size & weight controlled by a striing, unique feature Fill rice, plastic powder, sand; 2 lbs filled rice/ 4 filled sand no slip, Durable Material, PVC 600D Sloped design for front or rear rest just turn bag by 180 degree