This Sleeve is designed for "civil work" and is designed to be worn underneath regular clothes to simulate having no arm protection.  

Features of the helper hidden sleeve:

• durable French material - nylcot 
• fitted with thickness adjustment via lacing
• complete hand protection
• protects the helper's arm and forearm
• free bending at the elbow (leather insert)
• the outer shell is reinforced by stitches that create a quilted surface
• flexible
• additional appropriate internal reinforcement and sleeve lining
• ending the sleeve with a neoprene cuff prevents it from slipping from your hand