Keep your gear secure on even the harshest trails with our Expandable Essentials Tunnel Bag. The bag’s waterproof compression-molded nylon construction is designed with an expandable accordion-style top to allow for increased capacity and storage. It also comes with interior Velcro straps to further secure your cargo. So whether you're storing an extra pair of gloves, tools, or the extra mid-layer you just took off; your gear will stay safe, dry, and protected from the elements. With the new tri-glide attachment system it attaches quickly and easily to any model Timbersled rear tunnel area.