T-Shirt for a bachelor party, birthday, etc. Planning a bachelor party? Then this would be perfect for the groom or bride! And the rest of the party should have one as well, with sidekick written 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 material 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.