Inov8 Venturelite 18

The Venturelite is a minimalist, lightweight vest pack. Designed to give you versatile storage space with a large enough capacity for spare layers, accessories and enough fluids and food to keep you going.

Inov8 says

The perfect day pack for fast-paced hikes and adventures. The 18-litre capacity gives the ideal amount of storage space for a full day out hiking in the hills. An additional large stash pocket and side pockets make it easy to store items that can be quickly accessed on the move. The pack is made of a light, durable, recycled nylon fabric. It also features our new Air Release back panel technology, which delivers outstanding levels of breathability and comfort.