no sure but its a softer sponge so i would say not high density

Is there a particular way to wash this? Mine has black stains on it. Can I machine wash it?

To get rid of black stains on the Big Red Sponge, spray some Optimum Power Clean on it, rub it in lightly, then rinse it out thoroughly, you can also use Optimum FerreX on the sponge, spray it on, let it sit for a minute, then rinse it out thoroughly. The FerreX will break down any contamination in the sponge and restore it. Store the sponge in a bucket of fresh ONR at 256:1 or .5oz of ONR per gallon of water, put an air tight lid on it and you're good to go.

Is it safe to use with 1 bucket only?

Yes. That's how it was intended to be used. Keep a grit guard or two in your bucket. Having said that, I would have two buckets, each with their own sponge. One for wheels and one for paint. I was using one bucket but it gets dirty after a few washes. Remember to apply the minimum amount of pressure on the sponge. Just enough to maneuver around the car. I can do my whole car in about 30 mins. You also need to know how to dry your car and a good high gsm drying towel.

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🧼 Elevate your car wash game with the Big Red Sponge – clean smarter, not harder!

GENEROUS SIZE - Large 17.8 x 12.7 cm surface covers more area, speeding up your wash.
SOFT YET STURDY - Dense, plush material protects your paint while delivering a deep clean.
TRUSTED QUALITY - From Optimum Polymer Technologies, engineered for professional-grade care.
ECO CONSCIOUS CHOICE - Reusable design reduces waste without compromising performance.
ULTIMATE DIRT REMOVAL - Super porous texture traps grime effortlessly for a spotless finish.

The Optimum Big Red Sponge is a thick, super porous car wash sponge designed to remove dirt effectively while being gentle on paint. Measuring 17.8 x 12.7 x 7.6 cm and weighing just 6.8 g, it offers a large, dense surface for efficient cleaning. Reusable and crafted by Optimum Polymer Technologies, it combines durability with eco-friendly convenience.

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Yes, all products are sourced directly from authorized retailers in the US, UK, UAE and India. We maintain strict quality control processes and verify each product before shipping. All items come with applicable manufacturer warranties and are covered by our standard return policy.

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Delivery times vary by destination country, typically ranging from 3-9 business days. Each order is fully trackable through our system. We handle all customs clearance and use reliable courier partners for last-mile delivery. You'll receive regular updates about your order status via email and our app.

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Our prices include the product cost, international shipping, import duties, customs clearance, and local delivery charges. We handle all customs and import procedures, ensuring there are no hidden fees upon delivery. PRO members receive additional benefits including free shipping.

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Manufacturer	Optimum
Brand	Optimum Polymer Technologies, Inc.
Product Dimensions	17.78 x 12.7 x 7.62 cm; 6.8 g
Item model number	22516
Is Discontinued By Manufacturer	No
Special Features	Reusable
Item Dimensions L x W x H	17.8 x 12.7 x 7.6 cm
Item Weight	6.8 g

オプティマムビッグレッドスポンジ

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オプティマム ビッグレッドスポンジ

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オプティマムビッグレッドスポンジ