Bast Sauna Naver Review: Portable Sauna Tent for Triathlon Recovery
The Bast Sauna Naver is a portable sauna tent from a Swedish brand that takes heat therapy seriously. It sets up in under two minutes, reaches temperatures above 100°C, and packs down small enough to store in a cupboard. For triathletes looking to add heat acclimation and recovery protocols to their training, it’s one of the most practical options on the market.
Why Heat Therapy Matters for Endurance Athletes
Regular sauna use offers measurable benefits for triathletes. It increases blood plasma volume, which improves oxygen delivery to working muscles. It enhances your body’s heat dissipation mechanisms, making you more efficient in hot conditions. Post-training sauna sessions promote recovery by increasing blood flow to damaged tissues and reducing muscle soreness. Research from the University of Otago showed that runners who added sauna sessions to their training improved time to exhaustion by 32%.
Design and Build Quality
Bast developed the Naver in collaboration with Luleå University of Technology in Sweden. The tent uses three-layer fabric that’s both fireproof and waterproof, wrapped around a pop-up frame that springs into shape in seconds. The stainless steel wood-burning stove heats the space quickly and evenly, and you can add water to the stones for traditional steam.
- 2-6 person capacity — Room to share with training partners or use solo with space to stretch
- Sets up in under 2 minutes — Pop-up design, no tools or assembly required
- Reaches 100°C+ — Genuine sauna temperatures, not the lukewarm heat of portable steam tents
- 3-layer fireproof/waterproof fabric — Developed with Luleå University of Technology for durability and safety
- Stainless steel wood-burning stove — Efficient heating with natural wood fuel, no electricity needed
- 100-day satisfaction guarantee — Full refund if you’re not happy with the product
Packages and Pricing
Bast offers several Naver packages. The tent-only option starts at around £800, while the Deluxe package at approximately £2,240 includes the stove, chimney, stones, bucket and ladle, and all the accessories you need to get started immediately. For most buyers, the mid-range Premium package offers the best value — it includes the stove and chimney so you can start using it straight away.
Using It for Triathlon Training
The most effective protocol for endurance athletes is post-training sauna. Finish your session, rehydrate, then spend 15-30 minutes in the sauna. Start conservatively with 10-15 minutes if you’re new to heat exposure, and build up over 2-3 weeks. Three to four sessions per week is sufficient to trigger meaningful adaptations.
If you’re preparing for a hot race — a summer IRONMAN, for example — starting heat acclimation 3-4 weeks out gives your body time to increase plasma volume and improve thermoregulation. The Naver makes this accessible without a gym membership or proximity to a traditional sauna facility.
The Verdict
The Bast Sauna Naver is the real deal — genuine sauna temperatures in a portable package that sets up in minutes. The build quality is excellent, the wood-burning stove creates authentic heat, and the 100-day guarantee removes the risk. If you’re serious about heat acclimation and recovery, this is the most practical way to add sauna training to your routine.
Check the latest price on the Bast Sauna Naver →
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