WINTERISED RUNNING SHOES FOR YOUR BEST COLD-WEATHER RUN. When the weather turns cold and wet, you still owe it to yourself to get out there. These adidas Ultraboost 21 COLD.RDY Shoes make it easier. The insulated upper sheds water to keep your feet warm and dry. A Continental™ WinterGrip™ Rubber outsole keeps your footing secure on steep downhills and slippery stairs. Responsive Boost cushioning gives you an energised feeling that reminds you that you can always go one more step, maybe one more block or perhaps another mile. HIGHLIGHTS FROM PROBLEM TO PERFORMANCE This product is made with Primeblue, a high-performance recycled material made in part with Parley Ocean Plastic. 50% of the upper is textile, 75% of the textile is Primeblue yarn. No virgin polyester. CAN'T STOP. WON'T STOP. The incredible energy return of adidas Boost is created by fusing together energy capsules, giving you the power to keep your feet moving. CONTINENTAL™ WINTERGRIP™ RUBBER OUTSOLE The outsole gives the perfect traction on all surfaces in all wet and cold conditions. ULTRABOOST Comfortable and responsive, Ultraboost became our first shoe to be as popular in day-to-day style as it is in performance running. SPECIFICATIONS Sock-like fit Lace closure adidas Primeknit+ upper Textile lining Supportive heel counter Boost midsole Weight: 340 g (size UK 8.5) Midsole drop: 10 mm (heel 30.5 mm / forefoot 20.5 mm) Stretchweb outsole with Continental™ Rubber Primeblue Product colour: Crew Navy / Halo Blue / Pulse Yellow Product code: S23754 adidas Ultraboost 21 Cold RDY