Speedo Optik Spliced Powerback SPEEDO Optik Spliced Powerback * The new Drop Back is a contemporary evolution of our wide strap suit, offering the best in comfort and style with a tear drop keyhole. Perfect for training. * Sporty, contrast side splicing creates a slimming illusion. * Xtra Life Lycra? helps to resist bag and sag, keeping swimwear fitting like new for longer.