Subnautica 2 Rebreather — Blueprint, Recipe & What It Does
Subnautica 2 Rebreather: scan 3 wreck fragments to unlock, then craft with Fiber Mesh ×2 + System Chip. Conserves oxygen on deep dives — essential deep gear.
Last updated: 2026-06-14
What is the Rebreather?
The Rebreather is a head-slot equipment item that automatically adjusts gas pressure to assist lung inflation on deep dives, conserving oxygen. In plain terms: wear it and a single tank of air lasts much longer at depth — the deeper you go, the more it saves. It's one of the key pieces of gear that unlocks deep exploration, and all but essential before heading into deep biomes like the Karakorum.
💡 The Rebreather doesn't take your air-tank slot — it goes in the head equipment slot, so it stacks with the High / Ultra High Capacity Air Tank. Run both together for the best result.
How to unlock the blueprint
The Rebreather is unlocked by scanning blueprint fragments:
① Find Rebreather fragments scattered through wrecks & debris fields.
② Scan 3 fragments with your Scanner to unlock the recipe.
③ Fragments sit mostly in early, easy-to-reach wreck areas, so you can gather all three in your first few dives.
💡 Build a Scanner Room at your base to highlight nearby fragments — it greatly speeds up collecting all three.
How to craft it
| Item | Detail |
|---|---|
| Station | Fabricator |
| Materials | Fiber Mesh × 2 + System Chip × 1 |
| Unlock | Scan 3 wreck fragments |
Fiber Mesh is made from Fiber, which you can farm steadily from the early game, and the System Chip is a common electronics part. Neither is hard to source, so once the blueprint is unlocked, the sooner you craft it the better.
What it actually does
In Subnautica 2, the deeper you dive, the faster your oxygen drains. The Rebreather is what offsets that extra drain — equipped, the same tank of air lasts noticeably longer in deep water, giving you the margin to push further, gather, and still surface safely.
- Pair it with air tanks: stack it with the High Capacity Air Tank and Ultra High Capacity Air Tank to maximize deep-dive endurance.
- Pair it with the Tadpole: oxygen drains slowly inside the Tadpole, but the moment you step out to hand-mine or squeeze through caves, the Rebreather earns its keep.
- Make it before the deep: craft it before farming Atacamite, Conduit Crystal and other deep resources in the Karakorum.
One common mix-up: the Rebreather doesn't add oxygen capacity — it makes the air you already carry last longer at depth. That's exactly why it's worth running alongside a larger tank rather than instead of one.
FAQ
Q: Where is the Rebreather blueprint?
A: Scan 3 Rebreather fragments from wrecks and debris fields; they sit mostly in early, easy-to-reach wreck areas.
Q: What's the recipe?
A: Fiber Mesh ×2 + System Chip ×1, crafted at the Fabricator.
Q: How much oxygen does it save?
A: It offsets the extra oxygen drain that comes with depth, so the effect grows the deeper you go and a single tank lasts longer down low.
Q: Can I use it with an air tank?
A: Yes. It uses the head slot, not the tank slot, so run it alongside the High / Ultra High Capacity Air Tank.
Q: When should I craft it?
A: As early as possible. The materials are cheap, and crafting it immediately extends your safe dive time and exploration range.
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