UNDFTD and Beats by Dre have partnered to drop a pair of Powerbeats 2 Wireless earphones. The matte drab olive color inspired by Undefeated’s signature military styling is combined with Beat’s wireless earphones that are sweat and water-resistant with adjustable earhooks for a proper fit. Retailing for $249.95, the special-edition UNDEFEATED x Powerbeats2 Wireless in-ear…