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Bring the boot you dive in, and kick a firm blade next to a split on the shop floor.
Atomic BladeFins and the X1 push water with a firm blade. The open-heel SplitFin and the HEC SplitFin use a split blade, so a short flutter goes farther. Oceanic's Manta Ray uses a channeled blade for a long kick. All of these are open heel, so you wear a boot, and the pocket has to fit over it.
| Spec |  Blade FinAtomic |  Manta Ray FinOceanic |  Open Heel FinAtomic |  Open Heel HEC Fin w/SpringAtomic |  X1 FinAtomic |
|---|---|---|---|---|---|
| Price | $179.95 | $194.95 | $249.95 | $279.95 | $149.95 |
| Blade | Firm paddle. Monocoque rails and vertical strakes. | Channeled paddle | Split blade with power rails and flex battens | Split blade in HEC compound | Short, stiff paddle with low rails and strakes |
| Foot | Open heel, over a boot | Open heel, over a boot. Sizes XS to XL. | Open heel, over a boot | Open heel, over a boot | Open heel. Tall pocket for a large boot. |
| Strap | Stainless spring strap on an EZ-LOK buckle | Buckle heel strap | EZ-LOK buckle. Confirm the strap on the shelf pair. | Stainless spring strap, EZ-LOK buckle | EZ-LOK buckle. Spring strap available. |
| Build | Power plate under the foot. One-year fin warranty. | Thermoplastic blade and a rubber foot pocket | Power plate in the sole. One-year fin warranty. | Slightly positive in salt and fresh water | Monocoque tied to a power plate |
| Kick | Flutter, frog, and scissor. A lot of thrust per kick. | Long flutter and a steady track | Short flutter. Less effort than the BladeFin. | Short flutter. Softer than the BladeFin. | Frog, scissor, and turns in a tight space |
- A published gram weight for the Manta Ray is still a Databank fill.