The Forclaz trekking half-moon shaped waterproof storage Bags - 2 x 15L (2-pack) are specifically designed and shaped for storing, protecting and organising belongings in your backpack. The 2 pack consists of two 15 litre capacity bags that are large enough to pack essential items of clothing. These 2 waterproof 15L bags, which are specially designed for backpacks (thanks to their "half-moon" shape), are used to organise clothing and other important items in your bag and protect them from moisture and rain.