What is Instant Sweat™ Fabric?

Instant Sweat™ is RDX's proprietary nylon-PU composite material designed to trap and circulate body heat more efficiently than standard neoprene or polyester sauna suits. The nylon outer layer is wind- and water-proof, preventing heat from escaping; the PU inner layer builds thermal feedback against the skin, accelerating perspiration. RDX claims up to 20% more water weight loss compared to average sweat suits in equivalent training sessions.

Is a sauna suit safe to use for weight cutting?

Sauna suits are a common tool in combat sports for temporary water-weight management before weigh-ins. They are safe when used responsibly: keep sessions short (20–30 minutes of light exercise), stay well-hydrated before and rehydrate immediately after, and never use a sauna suit in high-ambient-heat conditions. Do not use one if you have cardiovascular conditions or have not been cleared by a medical professional for weight cutting.

How do I wash and care for the H1 Sauna Suit?

Machine-wash cold on a gentle cycle or cold hand-wash. Do not tumble dry, iron, or dry clean. Turn the suit inside out before washing to protect the outer layer. Hang to dry in a ventilated space away from direct sunlight. Avoid folding or compressing the suit while storing — hang it to maintain the elasticated components.

What size should I order?

The H1 Sky Blue is sized S–2XL for both men and women. Measure your chest and waist: S fits 34–36" chest / 28–30" waist; M fits 38–40" / 32–34"; L fits 42–44" / 36–38"; XL fits 46–48" / 40–42"; 2XL fits 50–52" / 44–46". The slim-fit design is close-fitting by intention to maximise heat retention — if you are between sizes, size up for a more comfortable fit during exercise.

RDX H1 Sauna Suit Sky Blue – detail view

RDX H1 Weight Loss Sauna Suit – Sky Blue Sweat Suit for Cutting Weight | S–2XL

RDX

RDX H1 Weight Loss Sauna Suit – Sky Blue Sweat Suit for Cutting Weight | S–2XL

$52.99 USD $68.95 USD

Title CLOTHING SAUNA SUIT H1 SKY BLUE-L CLOTHING SAUNA SUIT H1 SKY BLUE-XL CLOTHING SAUNA SUIT H1 SKY BLUE-2XL CLOTHING SAUNA SUIT H1 SKY BLUE-M CLOTHING SAUNA SUIT H1 SKY BLUE-S CLOTHING SAUNA SUIT H1 SKY BLUE-XS

Pickup available at 1320 Farmville Road

Usually ready in 24 hours

Reliable shipping

Flexible returns

RDX Sports understands that cutting-edge technology is needed even for something as straightforward as weight cutting before a competition. The H1 Sauna Suit is built with Instant Sweat™ Fabric — a hyper heat-insulating, wind- and water-proof nylon-PU blend that helps you cut up to 20% more weight than an average sweat suit. Shed water weight like a second skin. Elasticated hand and foot cuffs, jacket base, drawstring hoodie, and adjustable waistband maximise thermal retention while still providing complete range of movement. Advanced DS-Seam™ stitching ensures the suit holds up through repeated hard use. Sky Blue colourway. Available in S–2XL.

Instant Sweat™ Fabric — hyper heat-insulating nylon-PU blend that increases perspiration up to 20% more than a standard sweat suit
Wind- and water-proof outer with odour-free construction
Elasticated cuffs, ankles, waistband, and jacket base for maximum thermal retention with full range of motion
Drawstring hoodie and adjustable waistband for precision heat regulation and comfort fit
Washable — machine-cold-wash safe without damaging material
Advanced DS-Seam™ stitching for flexibility and resilience
Luminous logo for outdoor safety visibility | Sky Blue colourway | S–2XL

Frequently Asked Questions

What is Instant Sweat™ Fabric?: Instant Sweat™ is RDX's proprietary nylon-PU composite material designed to trap and circulate body heat more efficiently than standard neoprene or polyester sauna suits. The nylon outer layer is wind- and water-proof, preventing heat from escaping; the PU inner layer builds thermal feedback against the skin, accelerating perspiration. RDX claims up to 20% more water weight loss compared to average sweat suits in equivalent training sessions.
Is a sauna suit safe to use for weight cutting?: Sauna suits are a common tool in combat sports for temporary water-weight management before weigh-ins. They are safe when used responsibly: keep sessions short (20–30 minutes of light exercise), stay well-hydrated before and rehydrate immediately after, and never use a sauna suit in high-ambient-heat conditions. Do not use one if you have cardiovascular conditions or have not been cleared by a medical professional for weight cutting.
How do I wash and care for the H1 Sauna Suit?: Machine-wash cold on a gentle cycle or cold hand-wash. Do not tumble dry, iron, or dry clean. Turn the suit inside out before washing to protect the outer layer. Hang to dry in a ventilated space away from direct sunlight. Avoid folding or compressing the suit while storing — hang it to maintain the elasticated components.
What size should I order?: The H1 Sky Blue is sized S–2XL for both men and women. Measure your chest and waist: S fits 34–36" chest / 28–30" waist; M fits 38–40" / 32–34"; L fits 42–44" / 36–38"; XL fits 46–48" / 40–42"; 2XL fits 50–52" / 44–46". The slim-fit design is close-fitting by intention to maximise heat retention — if you are between sizes, size up for a more comfortable fit during exercise.