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Cool Student
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Cool Student

Marsoni M251S
Sale price$1123.00
Pay 4 payments of $280.75 a month.Shop Pay
Get it in 3 business days with 1 day shipping. Friday, May 29
Cool StudentTwo large main compartments Side water bottle pocket 15 inch laptop sleeve PU leather bottom and trim details Front utility pocket with organizer 2 exterior zippered stash pockets Ergonomic S curve shoulder straps Fully padded back panel Corded zipper pulls Web haul handle With a beefy base and a pair of self contained main compartments, the Cool Student carries its own weight. Load up with this large volume pack, complete with ergonomic S curve
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Your Cool Student orders ship within 1-2 business days.

Delivery Options:

  • Standard: 3-7 business days
  • Fast: 2-3 business days
  • Express: 1-2 business days

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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
4.6 ★★★★★
Based on 2380 reviews
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Product Reviews
M
Verified Purchase
michael underwood
Dallas, US
★★★★★ 5
Quality filter at a great price.
Style: CA9401
Great filter, very similar to K&N at a way cheaper price.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 14, 2026
S
Verified Purchase
scAmazon ShoPPer
Lexington, US
★★★★★ 3
Fit perfectly, but questionably thin.
Style: CA11053A
This was an exact fit for my 2017 Kia Forte S. My only convern is that it is half the width of the stock filters. Hopefully the different material will make the difference over time. Didn't notice a loss or gain of torque or acceleration after swapping for my old dirty filter.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on June 15, 2025
C
Verified Purchase
Casey M
Dallas, US
★★★★★ 5
Increased MPG!
Style: 33-3131
I don't know if it increases power, but it for sure has an increase of 1-2 MPG. About the same MPG increase as a K&N, but half the price.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 4, 2026
J
Verified Purchase
John K.
Birmingham, US
★★★★★ 4
Time will tell
Style: CA11053A
As another reviewer pointed out, the OEM paper filter is almost 3 times thicker than this one. All things equal, thicker would mean for filtering surface area. So with less filter media surface area, the filter would clog up quicker. However, since this is washable, maybe that's a moot point. I also noticed on my Hyundai Tucson, the rim of this filter must be slighter thicker because I had a tougher time clipping the filter box closed with this one installed. I am keeping my OEM for now, just in case.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on December 6, 2025
N
Verified Purchase
Nasir A.RAHMAN
Port Orchard, US
★★★★★ 5
PhilTop engine filter 1/2 the price of K&N filter No difference
Not much difference than K&N filter But 1/2 the price 100% identical
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 17, 2026

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