Spring Heel Straps (pair) Size:Longer Engineered entirely from Hytrel® ECO

Engineered entirely from Hytrel® ECO B — a single advanced thermoplastic elastomer with up to 74% biomass content

Upgrade the fit of your FoldingFins with stainless steel spring heel straps

The small fins pack more power than you'd expect

with four points of adjustment and two different-size bungee straps

Spring Heel Straps (pair) Size:Longer Engineered entirely from Hytrel® ECOUpgrade the fit of your FoldingFins with stainless steel spring heel straps. The coil spring holds constant, even tension across your boot a locked in fit that won't loosen as neoprene compresses at depth, with no mid dive adjusting. Saltwater resistant. Sold as a pair. Sizing: Shorter for boots EU 3642 Longer for EU 4348. Pick by your boot size (cut varies by brand), not your foot.