Nishimatsuya T-shirts/undershirts, size 90, 2 pieces (Navy and car pattern) Shimamura Fiber Heat undershirts, size 80, 2 pieces These were hardly worn because long-sleeved undershirts weren't needed at daycare. They are size 80, but the fit is large, and the size is similar to Nishimatsuya size 90. Both items are more suitable for children around size 80 rather than size 90. I rotated about 10 pieces in total for daycare wear! They've been worn to some extent, but I've washed them well with Oxiclean, bleach, Utamaro soap, and dishwashing detergent when they got dirty! I think they can still be worn.