A bit like the suit offer posted by nhskbhatia003.
See below instructions from the site:
1. Choose any pair of Blue Harbour Stretch Jeans from our range and add to basket
2. Go back to the Trousers & Jeans page and choose your Free £7.50 Blue Harbour Fleece & add to your basket.
3. Go back to the Trousers & Jeans page and choose your Free £3.50 Blue Harbour T-Shirt & add to your basket.
4. Proceed to Checkout
5. Discount will be deducted at checkout.
6. Saving applies to total price when items are purchased individually.
7. Items in this promotion cannot be refunded or exchanged individually.
8. All items must be refunded or exchanged together in order for a refund or exchange to be processed.
9. This does not affect your legal rights.
10. Subject to availability.
Available instore and online, minus VAT savings and Quidco etc.