Nitrous Express Proton Plus Jet Pack

Marsoni

M251S

$61.41

Get it in 3 business days with 1 day shipping. Friday, May 29

Nitrous Express Proton Plus Jet PackNitrous Express. PROTON PLUS JET PACK NX Jets are manufactured on CNC equipment and are guaranteed to be within . 0005 of specified jet size. In recent testing using the same jet size NX jets out flowed the competition by 35%! That's right 35% more flow through the same orifice how you ask? The NX jet was designed to be more than just a hole in a piece of brass. its contoured inlet and multi stepped outlet allow turbulence free flow with no

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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

I usually would buy XL size but in this case I bought XXL thinking since it's cotton it might shrink. But when I tried the T-shirt it was too small. My older XL sized T-shirt has 2 1/2" larger total shoulder width and 3" wider body width. See attached pictures. Length was also a bit shorter by about 1/2". I will to return it.

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Reviewed in the United States on April 15, 2026

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Pattie B

Whiting, US

★★★★★ 2

Does not match the size

Size: 3X-Large, Color: Blue

Way smaller than the size indicated. Very thin material, almost see- thru.

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Reviewed in the United States on December 5, 2025

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Robert

Draper, US

★★★★★ 5

Will buy again

Size: XX-Large, Color: White

Very comfortable. Fits as expected,

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Reviewed in the United States on September 15, 2025

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David M.

Natrona Heights, US

★★★★★ 5

Feels good on a cool day.

Size: Large, Color: Navy Blue

Why did you pick this product vs others?: I was looking for a mock turtle neck T-shirt so I was a bit surprised they were almost like a very light undershirt or sweater., or heavy tee. I like to wear them when it's cool or under a shirt or sweater. Washability: Machine wash, dry on warm as it's got spandex in it. Has held up to machine washing without loosing elasticity. Quality: Not a highly refined shirt. Quality is ok but could be better. Weight: About like a heavy tee shirt or very light undershirt. Fit: About like a tee shirt. Loose fit.

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Reviewed in the United States on June 29, 2025

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Sky Soldier

Lowell, US

★★★★★ 5

The material and tight fitting helps keep you warm…

Size: Large, Color: Green

I am 5’8” tall and weigh in at 172 lbs dressed. These are the most comfortable cold weather shirts I have ever worn. In my humble opinion, what makes these shirts so comfortable and warm is the tight fitting and the soft, fleece like feeling on my skin. I wear and ordered the large size. The shirt is cut so they fit close to one’s body and look great compared to other brands of shirts that end up looking like one is wearing a potato bag. The tight fitting helps keep me feeling warm. No cold air pockets.

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Reviewed in the United States on January 27, 2026