A single or sets of 2 or 4 large water bags to use as weighted anchors at the corner of any Port-A-Field field used on turf hard floors (gym floors concrete etc.) or any surface where inserting anchors into the ground is not possible. Large water bags should also be used as weighted anchors for the ends of internal lines such as goal lines or midfield lines. Each large water bag is 15 inch x 24 inch in size and comes with a 22 inch strap with clasp to attach to the field's corner rings. A rubber stopper at the top of each bag allows one to easily fill or empty the bag with water and securely close. Water is not included.