The Lightweight Troy Lee Designs 3900 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.Key Features: Features \"shock doctor\" technology - protective vest, Strata-foam - articulates with complex body zones while providing impact protection, Vent-track - moves air through flexible channels over skin surface to cool the rider ,Wide neck opening for comfort, Anatomical design - provides a close fit while integrated zones protect the chest, ribs..