TR stands for trail and that means that this shoe has an outsole with a stud profile. This way you have grip in all conditions when walking on unpaved paths. Don't let any obstacle stop you with this reliable trail shoe! Midsole The CMEVA midsole provides excellent cushioning and protection during your runs, regardless of the type of run. The CMEVA material is reactive and provides a high degree of comfort. Upper The Engineered Mesh upper provides support in strategic places around the midfoot and has high breathability in the forefoot. Reinforcement has been added to the bottom of the heel counter, while the top remains flexible, soft and comfortable, so that your heel bone does not come under pressure. Wear sole The durable Durabrasion rubber outsole with a coarse profile provides excellent grip on any surface. Zones of abrasion-resistant rubber have been added to the heel and forefoot for extra durability. The geometry of the outsole is designed to ensure inherent stability and an efficient stride. Don't let muddy and slippery surfaces hold you back with the HOKA Challenger ATR 7!