DescriptionOrtlieb Bike Packing Toptube Frame Pack – 4 Liter Dark Sand. The Ortlieb Toptube Frame-Pack is the smart solution for all who want to use their frames main triangle for storage space without having to do without their water bottle. Waterproof to IP67 standard (with fully closed zipper) means your gear stays dry in the worst conditions- even during river crossings.Waterproof fabric seams and zipper to IP67 standardsAttaches to top tube and seat tube with Velcro straps19.7″ L x 5.1″ H x 2.4″ W