altra women's torin 4 plush (5.5) navy/plum altra if you are looking for the most luxurious and plush ride available, the new torin 4 plush is the premium altra option. this first-class shoe features a responsive but comfortable quantic midsole, a choice strobel layer and is also paired with an all new perf-x insole for the ultimate underfoot experience. the new caress of the soft engineered knit upper, and the amazing flexibility combo of the innerflex integrated midsole and decoupled outsole allows your foot to move free and uninhibited as nature intended even with the torin’s long mile friendly cushion level.