UBR Sonic Vest is an ultralight down vest from UBR designed for warmth without bulk. Its seam-free Sonic Weave channels and full-stretch HD fabric deliver wind protection and breathable insulation for active use. Key attributes: Beige | Sand | Goose down | Windproof | Water-repellent (DWR coated) | Breathable | 800 fill power | Exceptionally lightweight — 330 g | Full-stretch HD fabric | Seam-free channels to prevent down leakage | Strategic laminations for even insulation | Sleeveless vest silhouette | Ultra-slim woven down channels | Seam-free Sonic Weave construction | Composition & care: 90% goose down, 10% feathers