T-Shirt for a bachelor party, birthday, etc. Are you going to host a bachelor party? Then this would be perfect for the groom or the bride! And the rest of the party should have one too, with the word sidekick on it! They come in different t-shirts, sweatshirts, hoodies, etc. search sidekick on nerdshop.dk The hooded sweatshirt is a simple and stylish classic hoodie; 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.