- Magnum, Men's T-Shirts, SALEMAGNUM mens T-shirt, a cool classic fit made from 100% organic cotton. The MAGNUM t-shirt has been in the making for months, with the infamous moustache giving a nod to the iconic series of the 1970's hit staring Tom Selleck. Launching this just before November is my way of supporting Movember, the fundraising month for Prostate Cancer UK. My own father had prostate cancer and an old YOUNG work colleague had it. The emphasis being on 'young' as cancer doesn't discriminate age, which is why it's important for men to look out for the signs. £5 from the sale of each T-shirt will be donated to Prostate Cancer UK, not just throughout November.