Lowe alpine tensor 15 backpack the tensor is great for day hikes and multi use the tensor 15 is a great lightweight general day bag ideal for summer hiking scrambling or multi pitch climbing this super clean this super clean 15 litre backpack is very lightweight and versatile the clean lines make it perfect for scrambling or multi pitch climbing but it also makes a great summer hiking pack this particular model has also become a firm favourite for those needing a small day bag for trave