Building on the previous model with an additional 2 mm of stack height, the Brooks Glycerin 23 GTS offers a noticeably softer and more comfortable stability-focused ride. Built around next-generation DNA Tuned nitrogen-infused foam, the midsole uses a dual-cell construction that softens impact at the heel while adding a more energetic, responsive feel through the forefoot, creating a smoothly balanced ride from landing to toe-off. This refined cushioning works in harmony with Brooks’ signature GuideRails® support system, which helps guide and stabilise the foot without feeling intrusive.