Lowe alpine tensor 20 backpack the tensor is great for day hikes and multi use the tensor 20 makes an excellent all round daypack for hiking scrambling multi pitching and even skiing the 20 litre capacity of this pack make it ideal for three season walking scrambling or climbing fully compressible with an external zippered pocket for storing your map or guidebook the side compression straps stabilise the pack keeping secure when youre moving fast these compression straps can also