The Ballista is our first spike to be engineered with multiple compounds to reduce weight and still provide rigidity underfoot, so you wouldn't be weighed down, but will still be supported. Combined with a single layer mesh supported by Flex Film, this makes the Ballista the lightest middle-distance spike on the market, which also gives you the perfect toe off for mid distance.OVERVIEW? Event: Track & Field? Surface: Track? Upper Details: A single layer mesh supported by Flex Film ? Bottom Unit Details: engineered with multiple compounds to reduce weight and still provide rigidity underfoot.? Weight: 3.1 oz. | 88 g

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