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 have one too, with "sidekick" on it! They are available in different T-shirts, sweatshirts, hoodies, etc. search "sidekick" on 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.