Rendered in sequin stretch velvet fabric, the Helsi Leslie Strapless Dress is a celestial show-stopper. A fully-boned bodice and fitted silhouette lend structure, while an alluring back slit lets you sashay across the dance floor. Rendered in sequin stretch velvet fabric, the Helsi Leslie Strapless Dress is a celestial show-stopper. A fully-boned bodice and fitted silhouette lend structure, while an alluring back slit lets you sashay across the dance floor. Helsi — a namesake of the founder’s mother, meaning “independent,” “confident,” and “ambitious” — designs hand-crafted, special occasion garments. Focusing on boutique pieces, Helsi’s team of artisans carefully crafts dimensional florals and trims with embroidery, feather, and pearl accents.