CRDGMD Keen Little Kids' Ridge Flex Mid WP Sizes 8-13 What if every step could feel easier on family backpacking trips and longer day hikes? Now everyone in the fam can benefit from Keen's built-in flex design. This waterproof hiking boot for kids pairs the trusted fit of Keen's iconic hiker with Keen's new KEEN.BELLOWS FLEX technology that reduces the energy each step takes - giving kids hiking boot support without the stiffness. Flex easier, hike happier, go farther.