GRK5 Racing Short Bumper Ver 2 [Shibata] R31S121

GRK5 Racing Short Bumper Ver 2 [Shibata] R31S121

Marsoni

M251S

$315.00

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

GRK5 Racing Short Bumper Ver 2 [Shibata] R31S121Product Description Our highly popular racing short bumper, designed specifically for the GRK5 nose cone, has been updated to the Ver. 2 model! This new product features a specially made carbon fiber material, custom made at a factory in Japan. It has been redesigned to be lighter and more compact than previous models. *This is a dedicated model that is only compatible with the aluminum nose cone of the GRK5 GRK5 R kit model.

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Fast: 2-3 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

I really like this pillow overall. It’s comfortable, supportive, and feels well made. When you use it without a pillowcase, it definitely feels cool to the touch and does what it claims in terms of that initial cooling sensation. However, once you put a pillowcase on it, you can’t really feel the cooling effect anymore. I’ve tried multiple different pillowcases made from different materials, and none of them really let that cool feeling come through. That said, I still love the pillow itself. It’s comfortable and supportive enough that I’m keeping it. Just keep in mind that the cooling feature works best without a cover, which isn’t ideal for everyone. Overall, a good pillow — just manage expectations about the cooling effect once it’s covered.

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Reviewed in the United States on February 17, 2026