The "London" xxx 5-Piece Tuxedo Set, designed by BLACKTIE, is part of our Stretch Collection (our most luxurious collection). Premium jacket, pants, and vest fabric consists of four-way stretch so your little one can still run & play in comfort. Stretch interior lining, a stretch shirt, expandable pants, and adjustable vest & bow ktie were designed to provide the most comfort possible. The overall craftsmanship of the Stretch Collection is equal to what you find in premium adult version suits. When only the best will do for your precious son or daughter, the Stretch Collection is the way to go!