TOP CROLL Chest Harness Converts both the AVAO® and the ASTRO® SIT harnesses to allow rope-access. With the same excellent comfort of the standard TOP, this version integrates a CROLL rope clamp to the sternal attachment point. Available with either a small or a large CROLL. The small CROLL has a textile sternal attachment point allowing for optimal weight and bulk reduction. NB. Shoulder stowage connectors not included in this version.