Our sand bag mooring kit is compatible with any boat cover that has tie-down loops in the hem. Kit comes with 4 sandbags (sand not included) constructed from durable 7oz solution dyed polyester marine grade fabric. Each bag has a hook and loop closure with sturdy quick release buckles. Simply unclip the buckle, slide through boat cover tiedown loop and clip closed. One kit is suitable for most boats, but larger boats may require additional kits. Maximum weight, 8lbs per bag. Color: black. Boat cover not included.