Customers say these liners are extremely comfortable and soft with excellent breathability. Many reviews highlight no chafing during runs of varying distances, from short training sessions to ultramarathons. The fabric quality and moisture-wicking performance are frequently praised. Common concerns include sizing inconsistencies—several customers report running large and recommend sizing down—and some experience riding up during runs. The 5-inch length receives more positive feedback than the 3-inch version. Users appreciate the separate liner and shorts system, though a few note minimal compression. Overall, customers report durability and suitability for running, hiking, and everyday wear.