The Troy Lee Designs 3900 Upper Protection Vest offers core upper body protection in warmer weather conditions.Shock Doctor technology with Neck brace integration design is compatible with leading neck braces without compromising fit and protection. Offering you protection while keeping you cool in hot weather.Featuring dual density protection in key areas, the vented foam padding provides additional airflow and is removable.Troy Lee Designs 3900 Upper Protection Vest FeaturesFeatures shock doctor\" technology - protective vestStrata-foam - articulates with complex body zones while providing impact protectionVent-track - moves air through flexible channels over skin surface to cool the riderWide neck opening for comfortAnatomical design - provides a close fit while integrated zones protect the chest, ribs.\"