Black diamond alpine flz trekking poles durable packable and highly versatile the alpine flz pole easily goes from summer hikes to winter ski tours by swapping the baskets and adjusting the secure easy to use flicklock pro system for a perfect fit description no stranger to crossover the black diamond alpine flz is the best z pole for four season use just as at home on a summer jaunt far from the trailhead as on a winter tour deep in the backcountry with 60 mm trekking baskets and c