The Oxford Products F1 Tail pack T18 is a small 18 litre volume tail bag made from highly durable rip stop nylon material. This has a showerproof inner liner to keep your essentials dry. This also has reflective detailing for added night visibility as well as an external pocket and elasticated netting inside for stowing lightweight items. Don't know what colour to get? No need to choose! This comes with 5 personalised colour inserts.