Lululemon Athletics alleges that Under Armour illegally copied the design of its $52 Energy Bra, which comes with four straps that criss-cross in the back. Under Armour, according to the suit, has infringed on Lululemon’s patents and trademark with four sports bras it sells at price points between $29.99 and $39.99. The sale of these products, Lululemon maintains, has “caused and will continue to cause irreparable damage” to its business.