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Purple

Purple Ultimate Seat Cushion

Purple's biggest and thickest: 21.75 x 18 x 2.5 in, 7.3 lb.

For an office chair, a car or truck seat, or a gaming chair.

About $159 at Purple when we checked (October 2026).

That's the regular price. It was on sale for $135 when we checked (October 2026).

Rated 4.3 out of 5 from 3,640 ratings at Purple when we checked (October 2026).

Check the price at Purple (opens in a new tab)

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The facts

Size
21.75 x 18 x 2.5 in
Thickness
2.5 in
Weight
7.3 lb
Material
100% GelFlex Grid, per the maker
Cover
2-way stretch woven cover, washable
Washing
Cover: machine wash cold, tumble dry low. Cushion: hand wash with warm water and gentle detergent.
Warranty and returns
1-year warranty; 30-day trial; ships free (maker)

What the maker states

  • Purple's biggest and thickest: 2.5 in
  • Grippy, no-slip design
  • Washable 2-way stretch woven cover
  • Made for 8+ hours of use, and for truck and car seats, gaming and office chairs, per the maker

Watch out for

  • The most expensive on the list.
  • Heavy (7.3 lb) and wide (21.75 in): measure the seat.
  • The maker says not to leave it in a hot vehicle; heat can warp the grid and may void the warranty.
  • The maker's page carries a California Proposition 65 warning (opens in a new tab)
  • Weight limit: Not stated by the maker.
  • If you add a cushion, check how your seat belt fits. NHTSA says the lap belt should rest across your hips, not your stomach, and the shoulder belt across the middle of your chest, away from your neck. Source: nhtsa.gov (opens in a new tab), checked 6 October 2026. Not professional advice.

Where this came from

We haven't tested this one. This page sums up what the maker and the store pages say, including where they disagree.