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PlungeBox PRO, hexagonal black tub with lid raised above it
PlungeBox PRO, exploded insulation layers diagram with callouts
PlungeBox PRO, Standard versus Pro comparison chart on dark ground
PlungeBox PRO, man in the hex tub by a pool with feature blurbs
PlungeBox PRO, woman in the tub in a garden with chiller unit at right
PlungeBox PRO, man stretching on the lawn beside the tub and mat
PlungeBox PRO, lidded hex tub with a bamboo mat on a garden lawn
PlungeBox PRO, man leaning back in the tub beside the pool
PlungeBox PRO, woman in the tub with the chiller unit and mat by the pool
PlungeBox PRO, tub rim with hoses running to the chiller on grass
PlungeBox PRO, hex tub and bamboo mat outside a glass door
PlungeBox PRO, hex tub, chiller unit and mat beside the pool
PlungeBox PRO, woman resting her arms on the tub rim in a garden
PlungeBox PRO, hex tub filled with ice on white
PlungeBox PRO, hex tub with raised lid and valve fittings on white
PlungeBox PRO, empty hex tub with open top on white
PlungeBox PRO, hexagonal black tub with lid raised above it
PlungeBox PRO, exploded insulation layers diagram with callouts
PlungeBox PRO, Standard versus Pro comparison chart on dark ground
PlungeBox PRO, man in the hex tub by a pool with feature blurbs
PlungeBox PRO, woman in the tub in a garden with chiller unit at right
PlungeBox PRO, man stretching on the lawn beside the tub and mat
PlungeBox PRO, lidded hex tub with a bamboo mat on a garden lawn
PlungeBox PRO, man leaning back in the tub beside the pool
PlungeBox PRO, woman in the tub with the chiller unit and mat by the pool
PlungeBox PRO, tub rim with hoses running to the chiller on grass
PlungeBox PRO, hex tub and bamboo mat outside a glass door
PlungeBox PRO, hex tub, chiller unit and mat beside the pool
PlungeBox PRO, woman resting her arms on the tub rim in a garden
PlungeBox PRO, hex tub filled with ice on white
PlungeBox PRO, hex tub with raised lid and valve fittings on white
PlungeBox PRO, empty hex tub with open top on white

PlungeBox PRO: Enhanced Thermal Insulation Tub

by SAUNABOX
Save 55% Save 55%
$399.00
$399.00 - $399.00
$399.00
$179.00
$179.00 - $179.00
$179.00

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PlungeBox PRO

PlungeBox PRO: Enhanced Thermal Insulation Tub

The PlungeBox PRO: Enhanced Thermal Insulation Tub is a hexagonal cold plunge tub built to keep your water cold for longer. Upgraded 3-inch multi-layered thermal insulation surrounds the water, which means more chill from every bag of ice. At 32 in. across and 29 in. tall, it holds 300L (79 gallons) and comfortably fits people up to 6 ft 9 in. or 250 lb. It weighs 7 lb empty and packs into its carrying case between sessions. Connect the PlungeBox 1/2HP Water Chiller Pro and you can leave ice behind entirely.

Most cold plunge tubs are round, a shape chosen for simplicity. The PlungeBox PRO takes a different approach, with a hexagonal design built to insulate better and give you more room. The portable design means you can set it up wherever your recovery routine takes you, from a backyard deck to a living room.

Diameter
32 in.
80 cm
Height
29 in.
70 cm
Capacity
300L
79 gallons
Empty weight
7 lb
3 kg
3-inch insulation Works with a water chiller UV resistant Carrying case included
PlungeBox PRO, man leaning back in the tub beside the pool

PRO technology

How it works

The PlungeBox PRO was redesigned from the ground up for thermal performance, durability and versatility as well as portability.

Hexagonal shape
Six flat wall panels give the PRO its hexagonal shape, built to insulate better and give you more room to sit comfortably. Sub-Zero Technology works alongside the insulation to keep the water icy, and a reinforced frame structure adds durability.
Six-panel wall design
Multi-layered insulation
Upgraded 3-inch thick, multi-layered thermal insulation forms a double insulation system around the water. Cold lasts longer per ice addition, and you use less ice per session. For regular plungers, the savings on ice add up, and sessions stay at target temperature longer.
Double insulation system
UV-resistant materials
The PRO is built from UV-resistant materials throughout, so direct sunlight does not degrade the tub walls or affect insulation performance over time. Set it up on a backyard patio or deck year-round without the material breakdown you would see in standard non-UV-rated inflatable tubs after a season or two of outdoor exposure.
Indoor or outdoor
Chiller compatible
The PRO connects to the water chiller. Connect it and eliminate ice management entirely, with temperature control down to 35°F, built-in filtration and ozone sanitation. The PRO's insulation means the chiller works with the tub's thermal retention instead of fighting against heat loss.
Ice-free option

Why cold plunge

Key features

The PlungeBox PRO's thermal performance makes a consistent cold plunge practice easier to keep up.

Muscle recovery
Cold that holds through the whole session
Reduce inflammation
Regular plunging, with ice or a chiller
Boost circulation
Seated immersion with room to settle
Energy and mood
A natural high from the cold
Mental resilience
Steady cold to sit through
Deep sleep
Plunge at home on your own schedule
Reduce soreness
A roomy hex interior to settle into
Boost metabolism
Plunging 4-7 days a week
Immune system
Part of a daily wellness routine
Mental clarity
A clear head after every plunge
Discipline and resilience
A daily habit you choose to keep
Stress reduction
A few quiet minutes in the cold

Using the PRO

How to use it

The PRO works indoors or out, with ice or with the chiller, and folds back into its case when you are done.

PlungeBox PRO, lidded hex tub with a bamboo mat on a garden lawn
Hexagonal design

Colder for longer

Six flat panels form the PRO's hexagonal shape, each one insulated and held inside a reinforced frame. A round tub's curved walls create uneven insulation contact, while the PRO's six flat hexagonal panels each keep full, flush contact with the water mass. Sessions stay more consistent from start to finish.

  • Double insulation layers in each wall panel
  • Cold lasts longer than round tubs of comparable capacity
  • Reinforced frame structure for added durability
Hexagonal shape Sub-Zero Technology
PlungeBox PRO, woman resting her arms on the tub rim in a garden
Spacious interior

Room to sit comfortably

The PRO gives most users enough interior space to sit comfortably without feeling compressed. The hexagonal shape also means the corners create slight recesses that give elbows and forearms somewhere to rest. There is enough water volume for consistent immersion up to shoulder depth for users of a wide range of heights and builds.

  • Spacious interior for most builds
  • Shoulder-depth immersion for most users
  • Corner recesses for elbows and forearms
Hex shape Shoulder depth
PlungeBox PRO, woman in the tub with the chiller unit and mat by the pool
Portability and chiller

Chiller-ready when you want it

At 7 lbs empty, the PRO is light enough to carry, store deflated, and set up wherever your routine calls for it. The included carrying case keeps everything organized between sessions or during transport. When you are ready to move beyond ice, adding the chiller gives you ice-free sessions on a schedule you set.

  • Genuinely portable and easy to store
  • Carrying case included for transport and organized storage
  • Hand pump included, inflates without a power source
  • Drainage hose included, empties without lifting the tub
  • Water chiller compatible, upgrade to ice-free operation at any time
  • High-quality construction built for long-term repeated use
Carrying case Ice-free option
PlungeBox PRO, hex tub and bamboo mat outside a glass door
Setup

Setting up the PRO

It takes about 10-15 minutes to fully set up the PlungeBox PRO. Remove the deflated tub from its carrying case and place it on a flat, stable surface, indoors or outdoors, near a water source and where drainage will be convenient. Use the included hand pump to inflate all six wall panels to full firmness, because the water weight needs solid inflation for the tub to hold its shape.

  • Fill with cold water to your immersion depth from a garden hose, in about 10-20 minutes
  • For ice sessions, add ice and wait 10-15 minutes for the temperature to equalize
  • For chiller sessions, connect the chiller and set your target temperature in the app
  • Step in and begin your session
  • After plunging, empty the tub with the drainage hose and cover it to hold the temperature
  • Change the water every 2 weeks based on use frequency
Hand pump included Drainage hose included

The PlungeBox lineup

How it compares

The PRO's six flat sides set it apart from the round and oval tubs in the PlungeBox range.

PlungeBox CORE, black cold tub with lid raised above it
PlungeBox CORE
A portable cold tub with double insulation.
Fits up to 6 ft 9 in. Double insulation UV-resistant materials
Shop the PlungeBox CORE
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PlungeBox PRO, hexagonal black tub with lid raised above it
PlungeBox PRO
A hexagonal tub with 3-inch multi-layer insulation.
79 gal (300L) 32 in. across 3-inch insulation
Currently viewing
PlungeBox XL, oval black tub filled with ice on white
PlungeBox XL
A lay-flat tub for full-body immersion.
500L capacity 48.4 x 31.1 in. Fits up to 6 ft 6 in.
Shop the PlungeBox XL
PlungeBox XL Pro Series, ice-filled oval tub with its lid propped open
PlungeBox XL Pro Series
A longer lay-flat tub with its lid included.
160 x 85 x 65 cm Lid included Black finish
Shop the XL Pro Series
PlungeBox Party Plunge, octagonal tub brimming with ice under a raised lid
PlungeBox Party Plunge
An eight-corner tub for a group, lid included.
200 x 200 x 70 cm Lid included Eight-corner shape
Shop the Party Plunge

PRO questions

Frequently asked questions

The PlungeBox PRO tub, a cover lid, a carrying case, a hand pump and a drainage hose, and free shipping is included with every PlungeBox PRO order. You add the water and ice; the tub itself needs no power, and only an added water chiller needs a standard 110V outlet.
Yes, it comfortably fits people up to 6 ft 9 in. (206 cm) tall or 250 lbs (113 kg) for full-body immersion to shoulder depth. The tub measures 32 in. (80 cm) across and 29 in. (70 cm) tall and holds 300 liters (79 gallons). The interior accommodates most builds comfortably for a full cold therapy session.
With the included hand pump, with no electric pump or power source required. Inflate each panel to firm rigidity before filling, because the full water weight puts significant pressure on the walls. Inflation takes approximately 5-10 minutes by hand.
You need less ice. The multi-layered insulation in the six wall panels slows heat transfer from the surrounding environment into the water, so the water holds your target temperature longer through and between sessions. Exact retention depends on ambient temperature.
Yes, the PlungeBox PRO is compatible with the PlungeBox 1/2HP Water Chiller Pro. Connect it with the chiller's included hose set for continuous temperature control down to 35°F. The PRO's insulation works in concert with the chiller, holding the temperature it sets.
Yes, the PlungeBox PRO is built with UV-resistant materials for outdoor use. Direct sunlight will not degrade the wall panels or reduce insulation performance over time the way it would with non-UV-rated materials, and the PRO suits permanent or semi-permanent setups on decks, patios and grass. For extended outdoor storage between uses, the lid helps protect the interior from debris and weather.
Change the water every two weeks based on use frequency, and between changes wipe down the interior with a natural cleaning spray and rinse dry. The cover lid reduces evaporation and keeps debris out between sessions. With the water chiller attached, its built-in ozone sanitation extends the time between full water changes, and no chemical additives are required for basic maintenance.
The PRO is an upright, seated plunge tub focused on thermal insulation and UV durability. The PlungeBox XL Lay-Flat (48.4 x 31.1 x 29.5 in., 500L) is built for lying flat, for full-length submersion.
SaunaBox backs the PlungeBox PRO with a 1-year limited warranty. Cosmetic marks, normal wear and tear, misuse and accidental damage fall outside it.
Possibly. It may be eligible for HSA/FSA payment for qualified customers through TrueMed; eligibility depends on your plan and documentation.
  • Type: Hexagonal inflatable cold plunge tub
  • Diameter: 32 in. (80 cm)
  • Height: 29 in. (70 cm)
  • Capacity: 79 gal (300L)
  • Empty weight: 7 lb (3 kg)
  • Fit: Up to 6 ft 9 in. (206 cm) tall or 250 lb (113 kg)
  • Insulation: Upgraded 3-inch thick multi-layered thermal insulation
  • Materials: UV-resistant materials; reinforced frame structure
  • Setup: About 10-15 minutes; inflates with the included hand pump
  • Power: None for the tub; a water chiller needs a standard 110V outlet
  • Chiller: Compatible with the PlungeBox 1/2HP Water Chiller Pro
  • Care: Change the water every two weeks; wipe with a natural cleaning spray and rinse dry
  • Warranty: 1-year limited
  • Insulation: Upgraded 3-inch multi-layered thermal insulation, a double insulation system that keeps the cold longer
  • Shape: Hexagonal design for better insulation and spacious comfort
  • Indoor and outdoor: Set it up in your backyard, on a patio or in your living room
  • Chiller ready: Compatible with the PlungeBox 1/2HP Water Chiller Pro for ice-free cold
  • Setup: Just add water and ice; about 10-15 minutes to fully set up
  • Portable: 7 lb empty, with a carrying case and hand pump
  • Build: UV-resistant materials and a reinforced frame structure
  • Tub: PlungeBox PRO, the hexagonal double-insulated cold plunge tub
  • Cover lid: Insulating lid that covers the tub between sessions, reduces heat gain and keeps water cleaner
  • Carrying case: Compact case for the deflated tub and accessories, for clean storage between sessions or during travel
  • Hand pump: Manual inflation pump, no power source required; inflates the PRO to full firmness
  • Drainage hose: Routes water to a drain or outdoor area and empties the tub without lifting or tipping
  • Delivery: Free shipping included with every PlungeBox PRO order



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