BrooksMen's Glycerin GTS 21 Supportive Running Shoe

Review:I recently put the Brooks Glycerin GTS 21 in Cloud/Black/Gold through its paces, and it delivers a plush, supportive ride perfect for daily runs and long-distance mileage.From the moment I stepped in, the cushioning felt incredibly soft—like running on clouds. Brooks added extra padding in this version, and you can really feel the difference, especially during longer runs. Despite the plush feel, the shoe remains surprisingly responsive and doesn’t feel overly heavy.The standout feature is the GuideRails support system, which offers subtle stability without being intrusive. It helps guide your stride naturally, making it a great option for mild overpronators or anyone seeking structured support that doesn’t sacrifice comfort.The engineered upper is soft and breathable, offering a secure and comfortable fit. It accommodates wider feet well and doesn’t cause any pressure points or discomfort, even after hours of wear.Pros:Exceptionally soft and cushioned rideSubtle, effective stability supportComfortable, breathable upperDurable outsole with good tractionTrue to size with room for natural toe splayCons:Slightly heavier than some performance trainersUpper may feel warm in hot conditionsNot ideal for speed-focused runsVerdict:The Glycerin GTS 21 is a premium daily trainer built for comfort and stability. It’s perfect for runners who prioritize cushion and support over speed and want a reliable shoe for everyday miles or recovery runs. A great choice for comfort-focused runners.

Why did you pick this product vs others?:I’m usually a Saucony wearer, but I wanted to try something different so I decided to give Brooks a shot. I generally wear stability shoes due to pronation, and I’m very picky about my footwear after dealing with plantar fasciitis for many years (pro tip: getting properly fitted for shoes definitely helps with that!). These shoes have a higher overall stack than I’m used to, but the comfort and cushion are on point. They look a little clunky, but are pretty lightweight and I love the different color schemes. So far, they’ve really been good to my feet for both running and walking. I will say the overall height takes some getting used to, but I can deal with that because they’re so comfy. Zero foot issues with these.

I am a long distance runner, averaging about 30 miles a week when I am not training for a marathon. I used to be a faithful Brooks runner but a few years ago switched to Saucony. My shoe line-up consists of Freedoms for races up to the half-marathon distance, the Tempus for distances beyond that and for training, and Guides for the steady runs throughout the week. My favorite shoe still is the Tempus, which provides some support, but despite the development away from support shoes, I feel I benefit from some support. The Glycerine GTS was recommended to me when I shopped for a new pair of Tempus', and I immediately liked the slightly plusher feel and comfortable ride. When my Guides hit the 500 mile mark and were ready to be retired, I got these as a replacement. They are fabulous! I have done a few longer runs in them (13.5-15miles) and found that right out of the box, they fit well and provide great support without feeling bulky or heavy, nor do they feel slow. I typically train in the 7-7:45 min/mile pace region and thought, I'd see s drop in my pace when wearing the Glycerins. But. that wasn't the case. They feel surprisingly snappy and comfortable. Of course, all of that is subjective, but you are not reading this as a scientific study. I like them better as the Saucony Guides (which almost feels outdated against these), but still like the Tempus' better.The only odd thing is that I had to size up. For years, I was a 12.5 in all my running shoes, but here I had to size up to 13. That's not much, 5mm, actually. And now that I have 60 miles in them, they loosened up a bit.Overall, an excellent shoe! They spark joy!

Great shoes. Very comfortable and good support. Bought for use on the treadmill. Was concerned that one review said he had to size up. I do have a pair of Hoka’s that are a little tight and at first thought these might be too small but actually they are probably a perfect fit.

great comfort for distance running. Extra support helps with foot fatigue and glycerine aids with minimalboot swell o half marathon