Nike ISPA Universal - Men's Shoes Progress, experimentation and craft. With a modular design and innovative components, the ISPA Universal lets you step into the future of footwear. Every pair is buffed by hand, resulting in a unique artisan finish that differs from shoe to shoe. Breath of fresh air, anyone? Modular, No-Glue Design Replaceable components and zero glue means less waste with every pair of shoes. Future Foam Bio-EVA foam, used throughout the design, is made with bio-based feedstocks derived from sugarcane. (Translation? Extra Insole Each pair comes with two sets of moisture-absorbing, 40% cork insoles—once the first set breaks down, you can simply replace the insole instead of replacing the whole shoe.