The Tahoe Mid GTX Boot adds a mid-cut, over-the-ankle design and AsoFlex AG support in polypropylene to keep the ankle stable when the pack gets heavy. GORE-TEX Extended Comfort membranes and a TPU-reinforced polyester upper protect against water and abrasion without weighing the boot down. AS-Tech technology carries the same structure that makes the low-cut Tahoe fast on day hikes into a build ready for lightweight overnights. What Our Gearhead(R) Experts Are Saying:"I've carried a loaded pack over uneven ground in these and never felt my ankle roll or wobble. The mid cut and AsoFlex support hold steady well after my legs start to feel the miles."