Penguin Print Turquoise Roomwear

This is a pair of penguin-patterned, suteteko style loungewear purchased at a physical store for around 4,000 yen a few years ago. I believe it's men's, but it doesn't have a fly, and I bought it for myself (a woman). It also has a pocket in the back, so I thought it would be good for lounging around the house, but I ended up storing it away without ever wearing it. I'd be happy if someone could make use of it.

There are no tags. I believe it's in good condition overall, but there are folding creases. I've included photos showing the condition of the creases, so please check them.

The brand appears to be Suzumen (涼綿). The following is borrowed from their official website:

Suzumen (涼綿), an improvement on the traditional Japanese Takashima Chijimi,
offers a smooth, refreshing feel and elasticity.

The fabric has deep wrinkles (shibo), which reduce the surface area in contact with the skin,
preventing stickiness even when you sweat.