Nike Air Max 90 LTR Big Kids’ Shoes The Air Max 90 returns with an even better feel for you. Cushioning is softer and more flexible than previous versions, the Max Air unit is tuned for growing feet and the shape gives your toes more wiggle room. With a design and look that are still the same, it brings a '90s fave to a new generation. Updated Classic Real and synthetic leather is durable and brings a classic feel.