Advice for Road Runners: The Brooks Men's Glycerin GTS 21 are Stability Running Shoes. GTS stands for 'go-to-support'.

These feature the same cushioning as the Brooks Glycerin 21 Running Shoes, but offer more support.

Underfoot Feel

The Brooks Glycerin GTS 21 Running Shoes should feel very cushioned underfoot. This is because they feature a thick layer of DNA LOFT v3 cushioning. As this is a nitrogen-infused foam, it offers lots of energy return.

Brooks' signature GuideRails™ support system functions in a similar fashion to the bumpers at a bowling alley. The structure helps keep excess motion in check, while also working with your natural motion.

One of the main benefits of GuideRails™ is that it should feel very natural; it only supports your feet and legs when it's needed.

Upper Fit

The Brooks Glycerin GTS 21 Running Shoes are all about comfort. As a result, they feature a premium engineered warp knit upper. There's also lots of padding around the tongue and ankle collar.

Ideal Run Type

High cushioning levels usually make long runs feel easier. It's for this reason we recommend opting for the Brooks Men's Glycerin GTS 21 Running Shoes on your longer training runs. Of course, they're also very good options for short recovery runs too. In theory, they should offer lots of comfort for any of your slower paced runs.

These are best suited to runners who have unstable feet and ankles. Brooks' GuideRails™ support system is primarily designed to help reduce the likelihood of knee injuries.

Technical Features

• Approximate weight: 297.7 grams
• Drop: 10 mm
• Forefoot stack height: 18 mm
• Rearfoot stack height: 28 mm

Brooks Run Happy Promise

Take your Brooks gear for a 90-day trial run. Put it through its paces and sweat in it as much as you want. If you are not 100% satisfied, return it to us for free.

Sizing Advice

Shoe size is a personal preference and everyone's feet are different, but we want to ensure you avoid any pain or discomfort from bruised toenails, rubbing, blistering or pins and needles.

Your running shoes should have enough width to allow you to spread your toes and should have some space at the front (we recommend having a half to one thumb's width of space from the end of your longest toe to the front of your running shoes).

This usually means that your running shoe will be at least a half size bigger than your regular shoe size though this can vary from brand to brand.