Positioned for minimum wind resistance and easy access. These bags are ideal for triathletes or riders wanting to keep energy food or other small items close at hand. Three models available: mesh cover, rain cover, or fully waterproof DryBag. Internal compartments keep items separated. Simple velcro strap fixing.Mesh Cover:- Small: 14x4x10.2cm, 0.6L, 59g- Large: 18x10.2x4cm, 0.72L, 72gAll-Weather:- Small: 14x4x10.2cm, 0.6L, 65g- Large: 18x10.2x4cm, 0.72L, 80gDryBag:- Small: 14.5x4.7x12.8cm, 0.6L, 65g- Large: 18x12.8x4.7cm, 0.72L, 120gNote: Sand, dirt, mud, etc., and bags that are incorrectly packed may cause the bike frame paint in contact areas to become dull or scratched over time. To avoid any potential damage, you should protect the frame or rack with foam covering or a protective film before attaching bags or panniers.