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