Retro51 x Rickshaw - 고양이 구조 시리즈 6 펜 슬리브

The sleeve matches the pen artwork perfectly, and the padded interior keeps it from rattling around in my bag. The elastic loop holds the pen snug without being a pain to slide in.

The artwork is cute and the pen slides in without any scratching, which is what I wanted. That said, the sleeve feels a bit thin for the price and I'm not sure it'll hold up with daily tossing in my bag.