- Straight Neckline - Frill Shoulder Strap Edge - Cross Over Back Shoulder Strap - Full Body Coverage - Crystal Embellishment The Illustration Nation Kids Straight Neck One Piece W Frill Straps is a handcrafted silhouette designed by our in house artisans. Reimagined in an exclusive limited edition print, our kid's one piece swimsuit features a square neckline and cross over back straps adorned with intricate embellishment and frill details.