T-Shirt for a bachelor party, birthday, etc. Are you planning a bachelor party? Then this would be perfect for the groom or bride! And the rest of the party should have one with the word sidekick on it! They come in different t-shirts, sweatshirts, hoodies, etc. search sidekick at nerdshop.dk The hoodie is a simple and stylish classic hoodie, it is a must-have for any hoodie lover. The fabric is a blend of 80% ring-spun cotton and 20% polyester or 70% ring-spun cotton (depending on color), 30% polyester, with a fabric weight of 280gsm.