Astral Sphere UTMB is engineered for those who push beyond every limit. Built for the relentless demands of ultra-trail running, its wraparound spherical lens delivers an uncompromising field of view across every terrain, every elevation, every condition. Photochromic lenses adapt instantly as the trail shifts from dense forest shadows to exposed alpine ridgelines. Featherlight yet indestructible, it stays locked in place from the first climb to the final descent. When the mountain tests everything you have, Astral Sphere UTMB keeps your vision — and your focus — razor sharp.