Synthetic-and-meshImportedGum Rubber soleThe Brooks? Cascadia 14 GTX trail running shoe lets you set the pace on any path and in any weather with its lightweight durability, waterproof protection, underfoot support, and reliable outsole grip keeping you stable every step of the way.Predecessor: Cascadia 13 GTX.Support Type: Neutral.Cushioning: Lightweight, flexible response.Surface: Trail. Differential: 8 mm. Tightly knit, birdseye mesh upper with a 3D Rubber Print Mud Guard overlay. GORE-TEX? membrane ensures breathable, waterproof protection from outside elements. Advanced 3D Rubber Print Mud Guard provides on-the-go protection from trail debris. Structurally-supportive mid-foot saddle. Lace-up closure with guard that keeps lace ends secure and tucked away. Heel pull loop. Padded tongue and collar. Soft Element fabric lining offers a great in-shoe feel.