Gear Review: Mammut T Advanced GTX Boot

Boots that can handle the up-and-down with ease.
T Advanced GTX


Overall Rating 4 / 5
Comfort/Fit 4.3


Support/Protection 3.8
Breathability 3.8

[climbers ’ choice]
Peakbaggers gravitated to the T Advanced for its up- and downhill performance. Deep, wide channels throughout the Vibram sole grip in thick mud, and beveled lugs in the heel and toe add bite while ascending and descending. The wide, flared heel platform delivers downhill braking, a rubber toe bumper adds protection, and a thick EVA midsole cushions feet on long approaches. $179; 3 lbs. 4 oz.; m’s 7.5-14, w’s 5-10.5;

Tester Notes

Barbara Weiss: I thought these were great all-around boots good for everything from long-hard day hikes, to multi-day backpacks and non-technical climbs on rock and snow. Great at edging on low fifth-class scrambles and comfortable as all get-out.

Walter Keutel: A lot of no's—and that's a good thing: no rubbing, no toe crushing, no slipping on snow and rock, no signs of wear. These boots simply always look good. And yes, the lacing system is efficient, but it is not friendly to gaiters because the laces don't reach beyond the middle of the foot.

Shayla Paradeis: The Mammut’s rugged handsomeness is my favorite thing. It feels like a hardcore boot. The fit—and the lack of arch support—is my least favorite thing, but it might be something that a pair of custom insoles could completely fix.

Ted Alvarez: My favorite of the test! Medium-to-narrow fit, great traction on central Cascades ledges; could walk in Olympic surf and stay dry so long as the water didn't overtop the ankle cuff. Break-in was nonexistent; breathability also great. Nice solid toebox and beefy rand protected against sharp rocks and sticks; traction on mud and wet leaves and needles (at a 35-ish degree angle) was infallible; not even a slip. Nice flex in the ankle for side-hilling, but with enough stability that you could stand straight on an edge mountaineering-style. At 3 lbs., they aren't the lightest in test, but they give a nice, tight mountaineering-boot feel for a not-too-heavy boot.