Gill OS1 Ocean Jacket is a professional offshore layer built for mariners and long-distance racers. It delivers dependable protection in rough seas and practical comfort for life on and off the water. XPLORE+® 3-layer technology: XPLORE+® 3-layer technology delivers exceptional waterproofing, breathability, and long-term durability in unforgiving marine environments. High ocean-ready collar with packable face guard: High ocean-ready collar with a packable face guard. High-visibility hood: High-visibility, fully adjustable hood. Photoluminescent reflectors: Photoluminescent reflectors boost 360° visibility in poor lighting. Reinforced abrasion-resistant zones: Reinforced abrasion-resistant zones protect against damage during extended offshore passages. Thermal brushed-mesh lining and pockets: Thermal brushed-mesh lining with hand-warmer pockets and an adjustable internal waist. Designed to keep you dry and warm, the OS1 features heat-retention lining and an adjustable internal waist for cold spray and driving wind. Proven in real-world conditions by Vendée Globe skipper Louis Burton, it elevates offshore performance and everyday wear.