The adidas Ultra Boost 2021 Halo Silver is a sleek and stylish running shoe that offers both comfort and performance. Featuring a silver and white colorway with a Primeknit upper, it provides a snug and supportive fit. The Boost midsole technology offers responsive cushioning and energy return, while the Continental rubber outsole provides excellent traction on a variety of surfaces. This shoe includes a Torsion System for added stability and support, making it a reliable choice for your next workout. The UltraBoost 21 'Halo Silver' also packs 6% more Boost capsules than its predecessor for a more responsive run. With a revised Torsion system for increased forefoot rigidity and a knit upper made with sustainable materials like Parley Ocean Plastic, these sneakers combine style and performance in an eco-friendly package.