Boost your cardiovascular performances with the Venum "Competitor" Speed Jump Rope! You will be able to perform intense workouts and activate a high "burn rate" of up to 700 calories per hour of dynamic activity, with at the minimum 0.1 calories consumed per jump! Weighted Jump Rope with a 2 years warranty. Material: vinyl. Size: 290 cm (114 inches). Fast changing weights: 150 grs (5oz) and 250 grs (9oz). High quality ball bearing for a smooth rope movement. No-slip grip for a sure, easy and ultra-comfortable grip.