Large 16” (40 cm) cube construction. Prevents throwline entangling and keeps throwline clean. Easily folds down to 8”x16” (20 x 40 cm) triangle. 2 Interior pockets keeps throw weights separate. Interior hook-and-loop strap and D-ring for quick line end recovery. 2 exterior corner loops makes it easy to open. 4-way stretch bottom, which expands during storage preventing seam failures.