I am a super fan of IAMRUNBOX.
This bag offers it all and worths every Krona. Good quality material and great design.
I bought both 30L and 18L of this bag and couldn't be any happier.
18L Spin Bag: This is literally my every day and everywhere backpack. It has the perfect size for your daily needs. I take it everywhere I go to; university, grocery, picnic or swimming. It has comfortable padding and a secure pocket at your hand reach while hanged on one shoulder.
30L Spin Bag: Large enough to take all you need for a weekend getaway or a light journey alike. However, take good note that the compartment below is not fully detachable and personally would not recommend 30L for someone 175 cm or lower! (it might look sort of big and sketchy.)
I Really like the SPIN BAG 18L. You can have it both when you run, but also when you ride a bike! I took the bag with me to the mountains and there it was really good to have.
The bag has a nice design and is also waterproof. It`s Very good storage in the bag with many small compartments! I am Very happy with this bag and I really recommend it!