The Premier long distance spike, made for optimal power transfer in each stride and designed to minimize fatigue over the duration of the race. Ultralight and breathable. Lightweight microfibre synthetis upper for soft, fit like a glove feel. Open weave material for quick drying. Non slip lining for extra comfort. Perforated EVA insole for comfort and breathability. Perforated midsole for comfort. Pebax and TPU outsole for an ultra lightweight performance whilst still giving excellent durability. Please note-on average spike shoes are approx one size smaller than a normal shoe. We would suggest you consider this when placing an order for spikes. For example- If you are a size 2uk then order a size 3uk. Receive a free set of spare spikes when you purchase these spike shoes. Simply state on your order form what length you require.