When you're grinding through those final switchbacks toward the summit, the last thing you want is sunburn slowing you down on the descent. The Arc'teryx Sunna Hoody delivers serious UPF 50+ protection in an ultra-lightweight package that won't weigh down your pack at just 132g. This technical hoody's four-way stretch fabric moves with you through every reach and scramble while actively managing moisture, so you stay comfortable whether you're powering up steep terrain or navigating exposed ridgelines. The helmet-compatible hood fits seamlessly under your climbing gear, and the pack-compatible length stays put when you're loaded up for multi-day adventures. From alpine starts to high-output trail days, this breathable sun hoody keeps you covered mile after mile without the bulk.