Ebony91 Olive BIRKENSTOCK PROFESSIONAL it’s the packable adventure layer

it’s the packable adventure layer you’ve been searching for

Ultimate comfort footbed for superior underfoot cushioning and a targeted cushioned heel pad

Resilient PWRRUN cushioning

As a tribute to iconic waves in Hawai‘i and the wāhine (women) who surf them

Ebony91 Olive BIRKENSTOCK PROFESSIONAL it’s the packable adventure layerThe Quarks Ebony91 is a women's winter boot from the Fall 2025 collection, shaped for the colder months ahead. Its winter boot design means you can count on it through low temperatures, while the boot silhouette works with layered fall and winter outfits. Women's winter boot from the Quarks Fall 2025 collection Boot silhouette designed for cold weather seasons Sized and styled specifically for women