Air Rift 16cm Keen Yellow-Green 17cm Keen Black 16cm No name written All were worn by a girl for one season. For feet that are high-arched and wide, the Air Rift was worn when she was sizing up by 0.5cm, and the Keens were worn when she was sizing down by 0.5 to 1cm because the opening is narrow. For reference. Socks were worn with the Air Rifts. The Keens were useful for river play and rocky beach play because they hold the foot securely. Each was used once. They have been thoroughly home-cleaned each time, but some fine sand that couldn't be removed remains. Strap: With straps Season: Summer Season: Summer, Autumn Season: Summer, Autumn, Spring Baby Lift Air Lift Air Lift Kids' sandals Water play River play Pool Beach Newport Season: Summer, Winter, Spring Season: Summer, Spring Season: Summer, Autumn, Spring