From the manufacturer

When additional protection is needed, but comfort is still a priority, turn to the Raid Elbow guards. D30 T5 EVO X is used for impact protection. D30 is soft and flexible to keep the guards comfortable while riding, but on impact, the D30 material hardens to disperse the energy for protection. Slip on a pair and head out to the bike park in confidence.

Features

• D30® T5 EVO X lightweight, low profile elbow impact protection
  
  
• Silicone grippers prevent slipping
  
  
• Spacer-prene sleeve combined with breathable mesh panel for all day riding comfort
  
  
• Durable, abrasion-resistant elbow panel
  
  
• Sold in pairs-left/right
  
  
• CE EN1621-1:2012, Level-1 Certified