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In-line Regulator Step Down
In-line Regulator Step Down
In-line Regulator Step Down
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In-line Regulator Step Down

Marsoni M251S
Sale price$170.95
Pay 4 payments of $42.74 a month.Shop Pay
Get it in 3 business days with 1 day shipping. Friday, May 29
In-line Regulator Step DownMany customers want to use the Avi with existing aircraft oxygen systems to increase endurance, but many of these OEM systems output between 70 100PSI. The Aithre Avi pulse demand systems require an input pressure of 50 60PSI, so plugging the AVI directly into this higher pressure source will break the AVI and will cause oxygen leakage. This Mountain High Aithre regulator will step down the pressure from your existing OEM oxygen system from 70 100 PSI
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Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
4.7 ★★★★★
Based on 1893 reviews
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I
Verified Purchase
Ivegotconfidence
Chelsea, US
★★★★★ 5
Perfect
Size: X-Large, Color: Light Grey
True Size. Fit perfectly. 5’10 200. Ordered an XL. Good quality and worth the money
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 18, 2026
E
Verified Purchase
Elaine Andrew
Carnegie, US
★★★★★ 5
I would buy again!
Size: Large, Color: Burgundy
I bought this set for my son's high school graduation back in May! Came quickly, and it was exactly what we needed. It fit as described, and looked very nice during the ceremony, along w his cap n gown. Well worth the $ spent!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on December 10, 2025
A
Verified Purchase
April Russell
Whiting, US
★★★★★ 5
Nice
Size: Medium, Color: White
Fit well for my son, he’s 6ft and 170
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 22, 2026
C
Verified Purchase
Catherine Smith'Dent
Charlottesville, US
★★★★★ 5
Love it
Size: X-Large, Color: Mint Green
Love the look, fits perfectly, great material.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 15, 2026
B
Verified Purchase
Brandee
San Leandro, US
★★★★★ 3
Ok product for average shape
Size: Large, Color: White
ok for the price but didn't work out for us. I had one guy whose body is thick and one who is thin. Couldn't get the set to fit on top and bottom at the same time, pants were a lil see through, but still decent quality and price.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on July 26, 2025

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