There is also a charge of £3.99 for postage per order.
Just checking on Sports Direct and they have a lot of various shirts from Slazenger.
Sleeveless T-Shirt £3.00
Tipped T-Shirt - £3.00
V-Neck T-Shirt - £3.00
Plain T-Shirt - £3.00
Polo tipped shirts - £4.00
Polo shirts - £4.50
The sizes also go upto 4XL, great value for money as i bought some previously a long time ago and they're still going strong.