If you’ve had to struggle through a heatwave like the one cooking the UK right now (where I’m based), then you know that you’ll do anything to try to stay cool: bumping up the AC if you have it, or turning on as many fans as you can find, and drinking gallons of water.And I have a new cooling hack for you: sitting in a cooling office chair. Because thanks to Prime Day you can get the AutoFull M6 Pro Gaming Chair for $424.99 at Amazon, saving you 15% off the usual price. In the UK, Amazon has the AutoFull M6 Pro on sale for £299.99 — that's £150 off the usual price.• Browse the full Amazon Prime Day saleI’m currently chilling in my DXRacer Martian Pro as it pulls cool air through my shorts thanks to in-built ventilation fans. It’s not like sitting on a block of ice — and I still have a Dyson Cool CF1 desk fan blasting at my face — but the chair’s cooling has been a noticeable improvement compared to a desk fan-only setup.I’m much less sweaty, and I don’t feel bothered by the heat baking my upper-floor flat — the only trouble is, it makes the times I need to get up and out of my seat a little less bearable by comparison.Now, I have some bad news: the Martian Pro I ride is out of stock in the US and UK right now — but there’s a solid alternative that we’ve tested, and which is not only in stock, but on sale at Amazon thanks to Prime Day deals.Last year during the UK’s 2025 summer heatwave we took the AutoFull M6 Ultra for a spin, and our reviewer Christian Guyton can confirm that the cooling fans made a noticeable difference after sitting in the chair for a while — which matches my DX Racer experience.Looking for more deals on cooling tech? Check out our pick of the 3 best super-quiet fans to help you sleep comfortably, and the best fan and air-con deals for beating the UK heatwave.Today's best gaming chair deals AutoFull AutoFull M6 Pro gaming chair AutoFull AutoFull M6 Ultra 2.0 gaming chair AutoFull AutoFull M6 Ultra+ 2.0 gaming chair AutoFull AutoFull M6 Pro gaming chair AutoFull AutoFull M6 Ultra 2.0 gaming chair AutoFull AutoFull M6 Ultra+ 2.0 gaming chair What’s extra special about these ventilated chairs is that they’re perfect right now in the sweltering heat, but they'll also keep you cosy in the winter thanks to in-built heaters. Much like their cooling fans, the seat warmers are again very effective at keeping your body comfortable.And these seats aren’t just electronic gimmicks. You’ll find a full suite of comfort features like 4D armrests, neck and lumbar support, and your usual recline and height options.The only thing that might be a slight let-down is the massaging which the chairs can provide. It can be fun and relaxing during a stressful gaming session or day at work, but it isn’t super rigorous.That said, I love my cooling gaming chair, and I’m considering picking up a second for my partner having looked at these deals; the AutoFull M6 Ultra 2.0 looks like a solid option in the UK, though I might see if I can stretch to the Ultra+.More Prime Day deals in the USAmazon Devices: Fire Sticks & Echo from $18Amazon Haul: viral gadgets, tech & appliances from $1.99Apple: MacBooks, AirPods & AirTags from $29Beauty: 50% off toothbrushes & hair toolsCheap TVs: smart TVs from $69.99Garden: tools, mowers, planters from $24.99Headphones: 50% off Beats, Bose & SamsungLaptops: Apple, HP & Dell from $199Mattresses: Sealy, Serta & more from $186Patio: outdoor furniture, rugs & decor from $19.99Sports: 50% off fitness gear, treadmills & clothingVacuums: Dyson, Shark & Bissell from $34More Prime Day deals in the UKAmazon Prime: get a 30-day free trialAmazon Devices: Fire, Ring & Blink from £13.99Amazon Haul: up to 30% offApple: up to 33% off AirPods & Apple WatchAppliances: up to 45% off Ninja & TefalBeauty: up to 60% off Philips & Oral-BEssentials: household goods from £5Fans: from £20Fashion: up to 50% offGaming: £90 off PlayStation 5Headphones: up to 50% off Beats & SonyLaptops: from £149Tablets: Samsung & Lenovo from £79.99Toys: up to 25% off Lego and ToniesTVs: from £129.99Vacuums: up to 40% off Shark & RoborockWearables: up to 30% off Garmin & Oura