Strapless Wedding Dresses With Black Strapless Wedding Guest Dresses & Windsor Strapless Wedding Guest Dresses & Windsor Black Sweetheart Long Sleeves Lace Backless Wedding Dresses Long Strapless Dresses & Windsor. The Black Strapless Notched Velvet Long Wedding Guest Dress combines luxurious velvet fabric with a sleek strapless design for a sophisticated evening look. The subtle notched detail adds a modern edge, while the floor length silhouette ensures elegance and poise. This dress offers a perfect balance of comfort and style, making it an excellent choice for guests attending formal weddings or upscale events.