All the benefits of the original plus the specially formulated compound SDS (Slow Deflate System) that allows the ball to deflate slowly when punctured. Designed for users that need the extra margin of safety when exercising, yet ideal for the demands of fitness applications that involve dynamic aerobic activities.

Suggested ball size for your height:
45 cm. = 4'7" - 5'0"
55 cm. = 5'1" - 5'6"
65 cm. = 5'7" - 6'1"
75 cm. = 6'2" - 6'8"
85 cm. = Over 6'9"