When the wind picks up on exposed rock faces or mountain ridges, the Arc'teryx Squamish Jacket delivers essential protection without the bulk. This ultra-lightweight windshell weighs just 145g yet punches above its weight class, featuring Tyono™ 30D fabric that blocks wind while maintaining the stretch and breathability climbers demand. The fitted cut moves naturally with your body through technical sequences, while the self-storing chest pocket with reinforced harness clip-in loop means your wind protection is always within reach during breezy belays or sudden weather changes. Whether you're tackling multi-pitch routes or hiking exposed ridgelines, this packable climbing jacket proves that sometimes the lightest layers make the biggest difference in your comfort and performance outdoors.