NWT! Seamless Katniss One Piece Swimsuit Color: Guava The Katniss One-Piece is our Ode to LSPACE with a super-modern twist -- new seam-free technology. Completely seamless with thick straps + a wide u-back, this suit move with you while hugging every curve. Seam-Free One Piece Wide Straps Wide U Back Darts At Bust. Classic coverage Size XS-XL 80% Nylon, 20% Spandex