Not obscene. Not any different than swimwear.
I agree with those about the disparity between men's and women's. THAT is what is obscene. Women are forced to wear smaller and form fitting clothing.
My oldest child did volleyball in middle school. She was incredulous because the required uniform did not meet school dress code standards, which are very sexist in the US. Her required shorts for gym class also were not dress code compliant. But go back to class in a tank top and boy oh boy would that be bad. 
🦞 The Lockdown Gang still chatting 🦞
