This is a used pair of Aqua Lung Express SS open-heel dive fins with stainless-steel spring straps. The spring adjusts itself to the boot as the foot moves, holding tension without a buckle to reset, and it stays usable with thick gloves.
The blade pairs a stiffer central spine with softer side rails so thrust builds through the kick without the blade collapsing. The foot pocket is shaped for use over a dive boot, with a heel pad for a stable contact point when donning and doffing.
As a used item, these fins show cosmetic wear consistent with prior diving. Please review the listing photos for the condition of this specific pair.