Military1st.co.uk have a good line of combat shirts from Helikon-Tex and you can select from various colours and variations at their online store... "Lightweight & breathable Helikon Combat Shirts with removable elbow pads are available at Military 1st. Helikon Combat Shirt is a close fitting UBACS type shirt with stand-up collar & zip up front, 2 pockets on each sleeve, hard elbow pads, ID Velcro panels & adjustable cuffs.

Ideal to wear underneath body armor, tactical vests or rigs.

Available in variety of colours & camo patterns at http://bit.ly/HelikonCombatShirts."