This is an essential piece of any serious mountain kit. Inspired by climbers, then refined to handle virtually anything, the Delta Jacket’s a go-to when thermal efficiency, stretch and all-mountain versatility are required. The Polartec Power Dry fleece’s voided grid construction delivers a high warmth to weight ratio and provides outstanding freedom of movement. The simplicity of design extends its versatility wear it as a midlayer in cold conditions or a standalone in cooler temperatures. Technical Features - Great warmth-to-weight ratio - Versatile - Warm and comfortable Collar Configuration - Mid-height collar layers easily Construction - Polartec Power Dry fleece has a voided grid interior for maximum warmth and a smooth outer surface for easy layering Cuff & Sleeves Configuration - Thumbholes help keep sleeves down and make layering easy Logos & Label Configuration - Arc'teryx Bird logo Pocket Configuration - Laminated chest pocket with laminated zip Sustainability - Contains materials that meet the bluesign criteria Zippers & Fly Configuration - Full front zip - Corded zipper pulls Materials - Polartec Power Dry Midwarmth grid backed jersey 84% Polyester - 16% Elastane bluesign Approved Material