A versatile fleece that layers easily, dumps heat on the uphill, and delivers warmth on the way down. Skin it, boot it, or just go for a hike. The women's Burton [ak] Helium Grid Full-Zip Fleece brings highly breathable, midweight warmth to mountain missions of any sort. The pack-friendly design is wind and abrasion resistant on the front with an extra breathable panel on the back. It's a go-to layering piece that can stand alone on the hike up and works great under a shell in exposed alpine terrain or on the descent.