The Peak Design Outdoor Sling 4L Black features a minimalist design and enough space for everyday essentials while offering simplicity for everyday missions, along with a weather resistant design. The Outdoor Sling 4L is the ideal middle ground between minimalism and gear capacity. With the same streamlined design as the 2L version but double the room, it's suited for cross-body or waist carry on short hikes or everyday outings. Weatherproof, eco-friendly and ultra-durable, it's just as ready to work solo as it is to team up with a backpack on longer adventures.