How it surfs
The split diamond tail is the design detail worth understanding before buying. Lost notches out the centre line to shorten the stringer and reduce area behind the back foot, which adds bite and control to a tail that is otherwise very wide.
The flat deck is a deliberate choice too. Lost points out that flat decks stay thinner for the same volume and flex more than domed or vee decks, and that flex suits a low-rocker board because it keeps it pliable and forgiving.
No verified retailer or editorial source publishes a numeric score for the Hydra, so the aggregate shown here is an estimate based on Lost's own published design data and the model's position in a well-established small-wave line rather than on scraped review numbers.
Volume & sizing chart
Use the chart below as a starting point. Add half a litre if you are less experienced, subtract half a litre for a looser feel.
| Size | Volume | Rider weight | Best for |
|---|---|---|---|
| 5'2" | 20.00 x 2.30 — 27.25 L | 55 to 65 kg | Intermediate+ |
| 5'6" | 21.00 x 2.50 — 33.00 L | 65 to 75 kg | Intermediate+ |
| 5'10" | 22.00 x 2.66 — 39.00 L | 75 to 85 kg | All levels |
| 6'2" | 22.63 x 2.75 — 44.00 L | 85 to 95 kg | All levels |
How it compares
| Board | Best at | Wave range | Aggregate score |
|---|---|---|---|
| Lost RNF 96 | Retro fish speed | Small to chest-high | 9.2 |
| Lost Puddle Jumper HP | High-performance small wave | Knee to head-high | 9.4 |
| Firewire Sweet Potato | Wide, high-float summer board | Ankle to chest-high | 9.0 |
Recommended fin setups
- Quad — Lost's Pelagic-outline small-wave boards are commonly ridden quad for drive off a wide tail.
- Thruster — A thruster set tightens the arc if the board feels loose in the tail.
Verdict
The Hydra is one of the more thought-through small-wave hybrids on the market, combining a genuinely fast low-rocker fish platform with tail and rail details aimed at real turning. It suits surfers who want summer volume without giving up performance, and it is not the right board for powerful surf.