I used this separately for the Soine-neru Mini. Since it was a spare for washing, I only used it a few times. It's not an official product for the Soine-neru Mini, but I was able to use it without any problems. A 50x90cm fitted sheet with a rubberized edge, made of 100% cotton with a tree pattern. Akachan Honpo Mori no Circus Fitting Sheet ● Material: [Fabric] 100% cotton ● Size (approx. cm): 60 x 90 ● Machine washable (use a net) ● Manufactured by Kyoto Nishikawa Co., Ltd. Made in Japan ● Full-perimeter elastic on the back Thank you for looking.