Variable thickness bouyancy cells. Bright contrasting trim. * Heavy duty construction. Low profile handle with D-rings. * Vest Style is meant to sit on upper back, not the entire length of the back to the tail. * Available in blue or pink heart print. Sizes XXS-Med * Size Chart - XXS: Back Length 5" / Chest Girth 11.5-17" - XS: Back Length 5.75" / Chest Girth 14-25" - Sm: Back Length 7" / Chest Girth 22-28" - Med: Back Length 8.5" / Chest Girth 29-37" -