Breathable mesh underlays for a softer and more adaptable fit with maximum stability. Experience ultimate performance with the Asics Upcourt 6 Lace-Up Trainers. Made with a durable synthetic upper and an anti-slip outsole, these trainers are perfect for sports like volleyball, handball, and squash. Take your game to the next level with these functional trainers from Asics. Upper: Synthetic, Sole: Rubber. Please try your footwear on before returning, as the box or label may state a US/Euro size which is different to the UK size.