The Almsthre Compact Bar Bag uses a hard shell construction that maintains its cylindrical shape regardless of how you pack it. This rigid structure lets you access contents one-handed while riding without the bag collapsing or flopping around when you unzip it. The shell measures seven and a half inches long by three and a half inches in diameter, which makes it one inch narrower than the Signature Bar Bag while retaining 1.2 liters of capacity. That size fits a phone, multiple energy bars, a lightweight jacket, a multi-tool, spare tubes, and CO2 cartridges without creating a bulky presence on your handlebars or interfering with cable routing on road or gravel bikes.

The main compartment opens via a waterproof zipper that runs the length of the bag. An internal mesh pocket keeps small items like keys, electronics, or arm warmers separated from bulkier contents, which prevents you from digging through the entire bag to find what you need mid-ride. A gusseted side zipper pocket sits on the exterior and expands to hold credit cards, cash, or ID without requiring you to open the main compartment. The ripstop nylon outer fabric sheds water and resists tears from branches, frame contact, or accidental drops, while the waterproof zipper prevents rain from entering through the closure during extended rides in wet conditions.

Mounting hardware includes adjustable handlebar straps and a stem tether cord. The straps offer multiple attachment points, which lets you position the bag to clear brake cables, shift housing, computer mounts, or drop bar flares depending on your cockpit setup. The tether cord anchors the rear of the bag to your stem, preventing forward rotation when you hit rough terrain, brake hard, or descend steep grades. You can also use the bag's webbing loops to attach race numbers during events, keeping your jersey clean and avoiding pin holes in technical fabrics.