Features Elastic backs accommodate a wider size range Contoured form-fitting design cradles knees and elbows Superior foam system absorbs hard impacts Streamline shape and design increases mobility Seamless interior finish provides ultimate comfort Ballistic nylon with industrial-weight stitching ensures durability Size specific caps create close contact with pad to minimize bulk Sizing: See Images for Measurement & Size Guide. Please Note: This size chart is based on an average and is a recommendation only. Every person is built differently. Should you be between sizng its recommended to size up. The 187 Killer Combo Pack is the industry best for safety and protection. Design and craftsmanship proven in the Pro Series is used to optimize the fit, comfort, and durability of this pack. 187 Killer Pads is the brand trusted by the top skaters in the world.