With a collapsible upper, the Terrex Voayager 21 H.Rdy Water Shoe easily slips into our bag. Once at the lake, we slide our bare feet under the airy, quick-dry uppers and pull the toggle tight before letting our ecstatic pup loose from the car. The Heat Ready technology delivers all-round airflow, keeping us cool under the sweltering sun. The ventilation ports also let water escape after we've waded in to coax our fetch-confused pup back to shore.